4. Albinism is due to a recessive, autosomal mutation. The frequency of albino squirrels is 4...
Albinism (lack of skin pigmentation) is caused by a recessive mutation on one of the autosomal chromosomes. A man and woman, both with normally pigmented skin, have an albino child together. For this trait, what is the genotype of the albino child? homozygous dominant homozygous recessive O heterozygous O hemizygous O unknown, not enough information
You are studying a population of squirrels in a city park in McMinniville Tn,. You are interested in this population because it contains some albinos (caused by a recessive allele for fur color). Recent studies in rural areas have shown that albino squirrels suffer predator mortality at a higher rate than normally colored squirrels. You want to know if natural selection acts on albinism in a city park in the same manner that it does in the wild. You go...
a) A man whose sister was an albino (due to an autosomal recessive mutation) marries an albino girl. If the couple has a child, what is the probability that they will have normal pigmentation? (Assume that if the problem does not state that an individual is an albino that they have normal pigmentation) Hint: Make sure you take into account that the man is not an albino when you calculate your probability. b) If you find out that the second...
Cystic fibrosis is an autosomal recessive disease caused by a mutation in a single gene with two alleles. Suppose the frequency of cystic fibrosis in a population is 3%. Assuming the gene is in HW equilibrium, calculate the allele and genotype frequencies. If the population consists of 100 individuals, how many are carriers (but unaffected) for the cystic fibrosis allele?
In humans, sickle-cell anemia (HBBSHBBS) is caused by the recessive condition of an autosomal gene with two alleles: HBBA (wild-type) and HBBS (sickle-cell mutation). In one population, the frequency of individuals who do not suffer from sickle-cell anemia (HBBAHBBA and HBBAHBBS) is 0.9964. Assuming the population is in Hardy-Weinberg equilibrium, what is the frequency of the HBBS allele?
Gaucher disease is an autosomal recessive disease that occurs at a frequency of 1 in 76.7, or q2 = 0.013. Let’s assume Gaucher disease is in mutation selection balance. Assuming a mutation rate of µ = 10-5, calculate the selection coefficient (s) against the allele.
A randomly mating population of dairy cattle contains an autosomal-recessive allele causing dwarfism. If the frequency of dwarf calves is 10%, what is the frequency of heterozygous carriers of the allele in the entire herd?
7. The frequency for ocular albinism is one in 200 in the Hopi population. What percentage of the individuals within this population will be in the homozygous dominant state? What is the approximate percentage of individuals who are in the heterozygous state? 8. In a certain population, one in 16 million (16,000,000) females is affected with factor VilI hemophilia How many males in this same population will be affected with this same condition? 9. Approximately one in 15,000 individuals in...
Question 7 4 pts A trait (or, phenotype) due to homozygous recessive mutation in a large randomly mating population affects 1 in 1,000 diploid individuals. What is the allele frequency for this recessive allele, assuming the population is in Hardy-Weinberg equilibrium? O 0.001 O 0.031 O 0.1 0 1
In a hypothetical population which is in Hardy Weinberg equilibrium, the frequency for a recessive allele is 30%. What percentage of the population would be expected to show the dominant trait in the next generation? Humans who are born homozygous for the recessive sickle cell allele die of sickle cell anemia, while those who are heterozygous are resistant to malaria (see chapter 4 for more information on this balanced polymorphism). 4% of the population of the Congo are homozygous recessive for...