explain how the ch (himalayan) allele and tyrosinase control the siamese coat-color pattern. what is the underlying reason that certain parts of a siamese cat (e.g., tail and ears) are darker than the cat's trunk?
Answers
The Siamese coat color pattern is controlled by the ch (Himalayan) allele and the enzyme tyrosinase, which helps produce melanin.
The Himalayan allele is a recessive gene that causes light-colored fur in warmer areas and dark-colored fur in colder areas. This is due to a temperature-sensitive enzyme produced by the Himalayan allele.
At the cooler areas of the cat's body, such as the ears, feet, tail, and face, the Himalayan allele is more strongly expressed.
This is because tyrosinase, which is produced by the gene, is more active in these cooler areas. Higher tyrosinase activity leads to the production of more pigment in these areas, resulting in darker fur.
Because tyrosinase is most active at lower temperatures, the fur on the face, tail, paws, and ears is dark, while the rest of the body is light in color.
Therefore, the reason for the darker parts of the cat's body is the higher tyrosinase activity in cooler body areas, which leads to more pigment production in these parts.
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Related Questions
Whale primary functions
Answers
The primary functions of whales include feeding, reproduction, communication, and migration.
Whales are primarily filter feeders or predators, depending on the species.
Filter-feeding whales, such as baleen whales, have baleen plates in their mouths that allow them to filter out small prey, such as krill or small fish, from large volumes of water.
Predatory whales, such as toothed whales, hunt and feed on various marine organisms, including fish, squid, and marine mammals.
Reproduction is another important function for whales. Most whale species have a gestation period of several months, with females giving birth to a single calf.
The calves are nursed with milk from their mothers and rely on their care for a period of time until they become independent.
Communication is vital for whales, as they rely on vocalizations to communicate with other members of their pod.
Whales produce a variety of sounds, including songs, clicks, and whistles, which serve purposes such as mating, social interactions, and navigation.
Migration is a common behavior observed in many whale species. Whales undertake long-distance migrations, often covering thousands of kilometers, to reach feeding grounds in nutrient-rich waters or to reproduce in specific breeding areas.
These migrations are driven by seasonal changes in food availability and environmental conditions.
In summary, the primary functions of whales encompass feeding, reproduction, communication, and migration, all of which are essential for their survival and successful adaptation to their marine environments.
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) You've processed two samples using an LDPSA and the grain size histograms are below. Describe the two samples in terms of predominant grain size (sand, silt, clay), sorting, and maturity. Based on this information, which one came from a beach and which one came from a river, and why?
Answers
Sample 1 likely came from a beach due to its dominance of sand, moderate sorting, and absence of silt and clay. Sample 2 likely originated from a river due to its fine-grained nature, poor sorting, and inclusion of silt and clay fractions.
Sample 1: The histogram for Sample 1 shows a predominant grain size in the sand range, with minimal representation of silt and clay. The distribution appears moderately sorted, with a narrow peak in the sand fraction. This suggests that Sample 1 likely originated from a beach environment. The dominance of sand indicates a coarse-grained sediment, typically found on beaches due to wave action. The moderate sorting implies moderate energy conditions at the beach, allowing for some sorting but not complete separation of grain sizes. The absence of significant silt and clay fractions suggests limited transportation and deposition in a marine setting.
Sample 2: The histogram for Sample 2 exhibits a broader distribution of grain sizes, including significant representation of silt and clay fractions. This indicates a fine-grained sediment. The distribution is poorly sorted, with no distinct peak or dominant grain size. These characteristics suggest Sample 2 likely originated from a river environment. Rivers transport and deposit sediments from various sources, resulting in a mixture of grain sizes. The presence of silt and clay suggests longer transportation distances and lower energy conditions compared to beach environments. Poor sorting indicates minimal sorting and mixing of sediments, as seen in river systems.
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The plants in the were allowed to self-pollinate.
Answers
Answer:
here's is your answer buddy
Explanation:
The plants in the F1 generation were allowed to self-pollinate. The plants in the P generation are true breeding.
Answer:
dentifying the Generation For each of the following statements, indicate whether the statement describes the P generation, F1 generation, or F2 generation.
The plants in the F1 generation were allowed to self-pollinate.
The plants in the P generation are true breeding.
After a cross, there are three times as many tall plants as there are short plants in the F2 generation.
Explanation:
hope it helps!
Cyanobacteria are important to the evolution and advancements of other life on Earth because they
options:
were the first lifeform on earth.
produced oxygen from photosynthesis.
were thought to have become mitochondria in the cells of animals.
were the first group of organisms to leave a fossil record.
Answers
Answer: b
Explanation: I took the test
Cyanobacteria are important to the evolution and advancements of other life forms on Earth because they: B. produced oxygen from photosynthesis.
What are cyanobacteria?Cyanobacteria is scientifically referred to as Cyanophyta and it can be defined as a group of single-celled, prokaryotic photosynthetic bacteria that live in aquatic habitats (water) and moist soils.
Additionally, this division of microorganisms are capable of manufacturing their own food through a process known as photosynthesis, which typically leads to a release of oxygen into the ecosystem.
In conclusion, Cyanobacteria are very important to the evolution and advancements of other life forms on planet Earth because they help in the production of oxygen through photosynthesis.
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Do tubifex worms have cells? if so, what are they?
Answers
Answer:
no
Explanation:
Tubifex tubifex, also called the sludge worm, “Boogie Worm”, or sewage worm, is a species of tubificid segmented worm that inhabits the sediments of lakes and rivers on several continents. ... They can also survive in areas heavily polluted with organic matter that almost no other species can endure.
Describe asexual reproduction in your own words
Answers
Explanation: person,organism. that has no sexual feeling or thoughts about it
Answer:
Asexual reproduction is the process where an organism gives life to an identical genetic offspring, multiplying themselves
Explanation:
Why might a scientist use a physical model of an animal cell instead ofstudying the cell directly?OA. Most scientists prefer to work with models rather than real-lifeobjects.OB. Animal cells are too difficult to find and can be observed onlyindirectly.OC. The model will give more accurate results than studying an actualcell.OD. A physical model is easier to manipulate and shows tiny detailsmore clearly.
Answers
A scientist might use a physical model of an animal cell instead of studying the cell directly because a physical model is easier to manipulate and shows tiny details more clearly. Even though cell tissues are difficult to maintain in lab conditions, results would be more accurate.
The correct answer is option D.
Note. this is grade 6 IGCSE biology (2.5 deforestation)
I need this answer as soon as possible
LAST EDIT DON'T ANSWER THIS QUESTION ANYMORE I DON'T NEED ANYMORE U R JUST GONNA WASTE MY POINTS
Answers
Answer:
Buying second hand wooden furniture is a good way to stop wasting trees and its better for the environment because there are many thing in the world why not using things that already exists.
Which body system is most responsible for the removal of waste?.
Answers
Answer:
Kidneys
Explanation:
The paired kidneys are often considered the main organs of excretion. The primary function of the kidneys is the elimination of excess water and wastes from the bloodstream by the production of the liquid waste known as urine
Answer:
Kidneys.
Explanation:
The paired kidneys are often considered the main organs of excretion. The primary function of the kidneys is the elimination of excess water and wastes from the bloodstream by the production of the liquid waste known as urine .
In addition to carbon dioxide, ______ is a reactant of photosynthesis.
A
oxygen
B
glucose
C
carbon monoxide
D
water
Answers
Answer:
Water.
Explanation:
Water is a reactant in photosynthesis.
Hemophilia is a genetic blood disorder where normal clotting of the blood at the site of a wound or injury does not occur. Tom (III-1) has hemophilia, but neither of his parents have it. However, his mother’s father (I-1) (Tom's maternal grandfather) does have it. In fact, no females have ever displayed the trait in Tom's family, but several males have been affected. The inheritance pattern is shown here in a pedigree. What best describes this inheritance pattern?A)sex-linked on the YB)dominant trait on the XC)sex-linked recessive on the XD)dominant trait on an autosome
Answers
Hemophilia is caused by a recessive allele found in the X chromosome, so if a male has the defective gene, he will present the disease, because it's the only copy of the gene that he has.
In an experiment where the farmer was looking at the effect of fertilizer on tomato growth, what would the control group be?
A. Soil
B. Water
C. Plants with fertilizer
D. Plants without fertilizer
Answers
Answer:b
Explanation:
What does central dogma refer to?
Answers
Answer:
The central dogma of molecular biology desrices the flow of genetic information in cells from DNA to messenger RNA to protien.
Explanation:
PLLLLZZZZ HELPPPP ITSSS DUE IN AN HOURRRR
Answers
Answer:
mr. smith because ice (or glaciers), wind, and ice could have possibly stripped off many layers of deposits. this kind of stuff frequently occurs in desert environments, making such discoveries easier.
Watch this video about how doctors are struggling to prevent and treat type-2 diabetes in children. then examine the model and answer the question that follows. an illustration showing the steps involved in the formation of urine diabetes is often suspected when glucose shows up in urine tests. use the model to explain how glucose could be present in urine. why do you think this symptom is especially concerning for young people?
Answers
Type-2 diabetes leads to elevated blood glucose levels and the excretion of urine in children poses the risk of kidney impairment of failure in children.
What is Type-2 diabetes?Type-2 diabetes is as diabetes which occurs as a result of resistance to insulin by the body cells or inability of the pancreas to produce enough insulin.
Type-2 diabetes is occurs most commonly in adults, but can also occur in children especially those that are obese.
The presence of glucose in urine is due to elevated blood glucose levels, thus the kidneys do not reabsorb but rather excrete glucose in the urine.
The continued excretion of urine in children can result in kidney impairment of failure in children.
Note: There is no video link given, so the answer is given based on Type-2 diabetes and its complications in young people.
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Individuals with a sex-linked condition called red-green color blindness do not see
the colors red and greed, Red-green color blindness is caused by the recessive allele
b and is carried on the X chromosomes. The dominant allele for normal color vision
is B. When the X chromosome contains the dominant allele, the allele is written as
XB, when the X chromes contains the recessive allele, the allele is written as Xb.
A man who is color-blind marries a woman who is not color-blind and is not a carrier
of the allele for color blindness. Create a Punnett Square to predict the possible
genotypes of their children,
What percent of their children will be colorblind?
A.) 0%
B.) 25%
C.)50%
D.) 100%
Answers
a) Does the amoeba have a permanent anterior or posterior end? Explain b) Do more than one pseudopodium ever start at once? Explain. c) Looking at the advancing end of the pseudopodium or hyaline cap, describe how the endoplasm and ectoplasm flow changes. ectoplasm by loking at the tip of the pseudlopodium
d) How can you tell the endoplasm and ectoplasm apart?
Answers
a) The amoeba does not have a permanent anterior or posterior end.
This is because amoebas are unicellular organisms that move by changing their shape through the use of pseudopodia. Since they can change their shape and direction of movement, they do not have a permanent anterior or posterior end.
b) Yes, more than one pseudopodium can start at once in an amoeba. This is because amoebas use pseudopodia for both movement and feeding. Multiple pseudopodia can be used to move in different directions or to capture multiple food particles at once.
c) At the advancing end of the pseudopodium, the endoplasm flows forward while the ectoplasm flows backward. This creates a pushing force that allows the pseudopodium to extend and the amoeba to move forward.
As the pseudopodium retracts, the endoplasm flows backward and the ectoplasm flows forward.
d) The endoplasm and ectoplasm can be distinguished by their appearance.
The endoplasm is the inner, more fluid part of the amoeba's cytoplasm, while the ectoplasm is the outer, more viscous part. The endoplasm often contains organelles and food vacuoles, while the ectoplasm is typically clear and free of organelles.
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Is Shibuya City a marine or continental environment?
Answers
Answer:
Well, Shibuya City is located in the Tokyo Metropolis of Japan and since it is an urbanized area, it is an continental environment.
how many joules of energy are required to freeze 5 grams of water?
Answers
The specific heat capacity of water is approximately 4.18 joules per gram per degree Celsius, and the heat of fusion of water is approximately 334 joules per gram.
To freeze 5 grams of water, we first need to calculate how much heat energy is required to lower the temperature of the water from room temperature (around 25°C) to the freezing point of water (0°C). This can be calculated using the formula:
Q1 = m * c * ΔT
where Q1 is the heat energy required, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature.
Using these values, we get:
Q1 = 5 g * 4.18 J/g°C * (25°C - 0°C)
Q1 = 523.5 J
So, 523.5 joules of energy are required to lower the temperature of 5 grams of water from 25°C to 0°C.
Next, we need to calculate how much heat energy is required to freeze the water. This can be calculated using the formula:
Q2 = m * Hf
where Q2 is the heat energy required, m is the mass of the water, and Hf is the heat of fusion of water.
Using these values, we get:
Q2 = 5 g * 334 J/g
Q2 = 1670 J
So, 1670 joules of energy are required to freeze 5 grams of water.
Adding these two values together, we get the total amount of energy required to freeze 5 grams of water:
Qtotal = Q1 + Q2
Qtotal = 523.5 J + 1670 J
Qtotal = 2193.5 J
Therefore, it requires approximately 2193.5 joules of energy to freeze 5 grams of water.
According to the question, approximately 2192.5 joules of energy are required to freeze 5 grams of water.
The formula for determining the energy is as follows:
Q = m × C × ΔT.where Q is the heat energy required, m is the mass of the water which is 5g, C is the specific heat capacity of water which is 4.18 J/g/°C and ΔT is the change in temperature.
Now, Q = 5 × 4.18 × 25
= 522.5 J.
Now, we require to determine how much heat energy is required to freeze the water. This can be calculated using the formula:
Q = m × Hf
where Q is the heat energy required, m is the mass of the water, and Hf is the heat of the fusion of water.
Q = 5 g * 334 J/g
Q2 = 1670 J
Now, to find the total amount of energy which is required to freeze 5 grams of water:
522.5 J + 1670 J = 2192.5 J.
Therefore, approximately 2193.5 joules of energy are required to freeze 5 grams of water.
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Alfred Wegener was the scientist who introduced the public to the idea of
Answers
Answer:
continental drift – the idea that Earth's continents move
Explanation:
Help please! DNA Assignment
Instructions: For this assignment, you will replicate DNA to make a complimentary strand of DNA. Then transcribe the complimentary DNA sequence into mRNA. Next, translate the mRNA molecule into the codes for specific amino acids using the amino acid chart on the last page. Lastly, address the reflection questions.
DNA Replication:
Replicate the following strand of DNA:
Original
DNA
A
T
G
A
A
C
C
A
T
T
C
A
G
T
A
T
G
G
Complimentary DNA
Transcription:
Transcribe the DNA to make an mRNA molecule
Complimentary DNA
mRNA Molecule
Translation:
Translate the mRNA into the corresponding amino acids.
mRNA Molecule
Amino Acid
Using the DNA sequence provided, determine the amino acids.
Original
DNA
A
T
G
G
G
T
C
T
A
G
C
G
A
A
A
G
A
T
Complimentary DNA
mRNA Molecule
Amino Acid
Questions:
Using what you have learned in the lesson and the experiment, answer the following questions in complete sentences.
What is the function of mRNA?
What is the function on tRNA?
Describe what happens during transcription.
Describe what happens during translation.
Explain how DNA is used to make a protein.
Answers
Answer:
DNA Replication:
Replicate the following strand of DNA:
Original DNA: A T G A A C CA T T C A G T A T G G
Complementary DNA:
Remember that the complimentary base pairs in DNA are Adenine-Thymine and Guanine-Cytosine, or A-T and G-C. This means that if the original sequence is:
A T G A A C C A T T C A G T A T G G
Then the compliment is (replace with the opposite base pairs):
T A C T T G G T A A G T C A T A C C
Transcription:
Transcribe the DNA to make an mRNA molecule
COMPLIMENTARY DNA:
mRNA Molecule:
So if our complimentary DNA (antisense stand) is T A C T T G G T A A G T C A T A C C then to transcribe, we basically create another complimentary strand, but for mRNA, we use Uracil instead of Thymine:
A U G A A C C A U U C A G U A U G G
Translation:
Translate the mRNA into the corresponding amino acids.
mRNA MOLECULE:
AMINO ACID:
Using the DNA sequence provided, determine the amino acids.
Next, take each codon (3-base set) to the table and record the corresponding protein:
A U G = Methionine (start)
A A C = Asparagine
C A U = Histidine
U C A = Serine
G U A = Valine
U G G = Tryptophan
ORIGINAL DNA: A T G G G T C T A G C G A A A G A T
Complementary DNA:
mRNA DNA Molecule:
Amino Acid:
And we do it all again:
A T G G G T C T A G C G A A A G A T = original DNA
T A C C C A G A T C G C T T T C T A = complementry DNA
A U G G G U C U A G C G A A A G A U = mRNA
A U G = Methionine (start)
G G U = Glysine
C U A = Leucine
G C G = Alanine
A A A = Lysine
G A U = Aspartate
Explanation:
which statement is true about malignant tumors? they grow by expansion. they demonstrate cells that are well differentiated. they gain access to the blood and lymphatic channels. they usually grow slowly.
Answers
Answer:
I would go with C. They gain access to the blood and lymphatic.
Explanation:
We can rule out the last one "they usually grow slowly" because they grow quickly. It does access to the bloodstream and lymphatic channels.
Hope this helps. Sorry if I'm not right
Identify how a hormone molecule performs its function. formation of mRNA in the nucleus initiation of DNA replication because of a signal given by the hormone secretion of hormone by tissue synthesis of protein molecule by mRNA and tRNA binding of the hormone molecule with its receptor of the cell secretion of protein by the cell
Answers
Answer:
binding of the hormone molecule with its receptor of the cell.
Explanation:
Hormones are chemical messengers secreted or released by endocrine glands to effect a response in another location called target location. Hormones are proteinous molecules and like every other protein, its function is determined by its shape.
Hormones function or effect their changes by binding to the receptor of the target cell. The hormone recognizes and will only bind to its own receptor molecule on its target cell on order to bring about any change. This defines the specificity of the hormone.
State TWO reasons why it is important to control the amount of body fat in the human body
Answers
Answer:
To maintain the right body temperature, it is essential to have adequate body fat. Body fats are the storehouses of energy in the body. Body fats are necessary to ensure the smooth functioning of cells. Body fats have a cushioning effect on organs and tissues.
Two species cooperating to help each other is known as ____________.
A. Leguminism
B. Commensalism
C. Parasitism
D. Mutualism
Answers
Answer:
Mutualism
Explanation:
Mutualism is when two species work together to benefit each other. Like there are certain species of bird that sit on rhinos and eat pests/bugs on them, this benefits the bird cuz it gets food and it benefits rhino cuz it does not get bugged (pun intended)
Segmented worms with bodies are _____.leechesscallopsearthwormsnautiluspolychaeta
Answers
Annelida are worms whose bodies are divided into similar rings or segments. they are classified into three groups, Polychaeta, Oligochaetes, Hirudine, and Achaea.
Polychaeta is the bigger group in the Annelida, and everyone has equal segments.
Leeches are segmented parasitic predatory worms in the Hirudinea subclass, in the Annelida phylum.
The scallop is a name of various species and does not belong to the Annelida phylum.
The earthworm is a terrestrial invertebrate that belongs to the Annelida Phylum.
Nautilus is from the Mollusca phylum and does not belong to the Annelida.
The subphylum Polychaeta, the leaches, and the earthworm are the ones that match the description of segmented worms
Which solution is most acidic?
A.pH=3
B.pH=7
C.pH=10
D.pH=14
Answers
Answer: A
Explanation: The lower pH is higher acidity, and 3 is the lowest so it is the most acidic.
Which of the following statements about replication is false? a. A DNA double helix could contain one strand that is ten generations older than its complementary stand. b. Licensing factor ensures eukaryotic replication occurs only once per cell cycle. c. Replication can continue in either direction from the origin of replication. d. A DNA strand can serve as a template more than once. e. A DNA double helix may contain two stands of DNA that were made at the same time.
Answers
The false statement about replication is d. A DNA strand can serve as a template more than once. During DNA replication, each strand of the original double-stranded DNA molecule serves as a template for the synthesis of a new complementary strand.
The process is semi-conservative, meaning that each of the two resulting DNA molecules contains one strand from the original molecule and one new strand. However, once a strand has been used as a template, it cannot be used again for replication. Option A is true, as it is possible for one strand of a DNA double helix to be older than its complementary strand due to semi-conservative replication. Option B is true, as the licensing factor ensures that DNA replication occurs only once per cell cycle in eukaryotes. Option C is true, as replication can occur in both directions from the origin of replication. Option E is true, as both strands of a DNA double helix can be synthesized simultaneously, and therefore be of the same age.
Therefore, option D (A DNA strand can serve as a template more than once) is the false statement about replication.
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The steps of the scientific method are listed below. Check the box next to each step of the scientific
method that you think communication plays an important role in.
Ask a question based on observation and research.
Form a hypothesis.
Make a prediction.
Perform an experiment.
Analyze results and draw conclusions.
Accept or reject the hypothesis.
Record and communicate results.
Answers
Answer:
It's the first one, never is ask a question first. hypothesis is first.
Explanation:
Answer:
A,E,G
Explanation:
Help! Which of the following describes energy and matter in ecosystems? Explain why you chose your answer. Answer choices are in the picture below.
Answers
Answer:
the answer is 'b' matter recycles but some energy is transferred.
Explanation:
Matter cannot be created no destroyed, so it must remain in the system. Energy, however, gets used to preform simple tasks. It gets used for the animals even as it passes on from animal to animal. it takes energy for living things to keep on living, but matter will never go away.