Homework Answers
Some mutations don't have any noticeable effect on the phenotype of an organism. This can happen in many situations: perhaps the mutation occurs in a stretch of DNA with no function, or perhaps the mutation occurs in a protein-coding region but ends up not affecting the amino acid sequence of the protein.
Secondly some mutations are silent point mutations. They are neutral because they do not change the amino acids in the proteins they encode. Many other mutations have no effect on the organism because they are repaired before protein synthesis occurs.
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17. Most randomly occurring mutations that occur in humans do not have an effect on phenotype....
Most nonsense mutations in a structural gene for a protein have a null phenotype. How many...
Most nonsense mutations in a structural gene for a protein have a null phenotype. How many different single base substitution mutations in a protein coding sequence can produce a nonsense mutation?
15. The gene for petal color in a flower has incomplete dominance, so that individuals with...
15. The gene for petal color in a flower has incomplete dominance, so that individuals with two Al alleles (AIA) are red, individuals with two A2 alleles (A2A2) are white, and individuals with one of each allele (AIA2) are pink. In a cross between a red flower and a white flower, what is the probability of getting a pink offspring? (2 points) In a cross between a red flower and a pink flower, what is the probability of getting a...
In a cross between two mottled offspring, what is the probability of getting a mottled offspring?...
In a cross between two mottled offspring, what is the probability of getting a mottled offspring? (2 points) In a cross between two mottled flowers, if there are two offspring, what is the probability of getting one black offspring and one white offspring? (2 points) In a cross between two mottled flowers, if there are two offspring, what is the probability of getting one white offspring and one mottled offspring? (2 points) In a cross between mottled flowers, if there...
Genetic changes caused by mutations can have the following outcome(s) on the phenotype of an individual_______________...
Genetic changes caused by mutations can have the following outcome(s) on the phenotype of an individual_______________ Answer choices: A) no effect on the fitness B) increases fitness C) all of the above D) reduces fitness
What effect do mutations have on a population's genetic variation
What effect do mutations have on a population's genetic variation
Which of the following mutations would be most likely to have a harmful effect on an...
Which of the following mutations would be most likely to have a harmful effect on an organism? (A) a deletion of three nucleotides near the middle of a gene (B) a single nucleotide deletion in the middle of an intron (C) a single nucleotide deletion near the end of the coding sequence (D) a single nucleotide insertion downstream of, and close to, the start of the coding sequence In this problem, why (c) cannot be the answer?? Single nucleotide deletion...
Q7. If two animal inbred populations have the same recessive phenotype, which is independently controlled by...
Q7. If two animal inbred populations have the same recessive phenotype, which is independently controlled by a recessive homozygous condition at two different loci. What genetic experiment would you perform to confirm that the same recessive mutant phenotype of the two populations was caused by the mutations in the same or different genes? Do you agree or disagree that the same genetic test can be applied for the dominant gene mutations? Why or why not? (10 Points) I
cancer arises after many mutations occur in cell. which of the following cells are most likely...
cancer arises after many mutations occur in cell. which of the following cells are most likely to have increased mutations over time. a) cardiac muscle b) neurons c) blood
why us ur that some gene mutations can have drastic effects in ones phrnotype ( like...
why us ur that some gene mutations can have drastic effects in ones phrnotype ( like death ir debilitating dusease) while ktber mutations no effect on the phenotype whatsoever?
1. In humans, X and Y chromosomes are technically not homolous Explain how X and Y...
1. In humans, X and Y chromosomes are technically not homolous Explain how X and Y chromosomes pair up in cells of males prior to cell division 2. Familial breast cancer is caused by mutations in the BRCA1 gene which is located on human chromosome 17. Females with a mutation in BRCA1 gene have an 80% lifetime risk of developing breast cancer. Therefore, out of 100 women who carry the disease-causing mutation, only 80 will develop breast cancer. Why is...
15. The gene for petal color in a flower has incomplete dominance, so that individuals with two Al alleles (AIA) are red, individuals with two A2 alleles (A2A2) are white, and individuals with one of each allele (AIA2) are pink. In a cross between a red flower and a white flower, what is the probability of getting a pink offspring? (2 points) In a cross between a red flower and a pink flower, what is the probability of getting a...
In a cross between two mottled offspring, what is the probability of getting a mottled offspring? (2 points) In a cross between two mottled flowers, if there are two offspring, what is the probability of getting one black offspring and one white offspring? (2 points) In a cross between two mottled flowers, if there are two offspring, what is the probability of getting one white offspring and one mottled offspring? (2 points) In a cross between mottled flowers, if there...
Q7. If two animal inbred populations have the same recessive phenotype, which is independently controlled by a recessive homozygous condition at two different loci. What genetic experiment would you perform to confirm that the same recessive mutant phenotype of the two populations was caused by the mutations in the same or different genes? Do you agree or disagree that the same genetic test can be applied for the dominant gene mutations? Why or why not? (10 Points) I
1. In humans, X and Y chromosomes are technically not homolous Explain how X and Y chromosomes pair up in cells of males prior to cell division 2. Familial breast cancer is caused by mutations in the BRCA1 gene which is located on human chromosome 17. Females with a mutation in BRCA1 gene have an 80% lifetime risk of developing breast cancer. Therefore, out of 100 women who carry the disease-causing mutation, only 80 will develop breast cancer. Why is...
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