In Drosophila, there are four different independently assorting genes influencin
ID: 82961 • Letter: I
Question
In Drosophila, there are four different independently assorting genes influencing wing traits. How many unique gametes can the following individual make: AaBBCcdd? If the above individual mated with a aaBbccdd individual, what proportion of the offspring would be carriers for the recessive a allele? If AabbCcDd mated with aaBbCcdd, what is the probability of them producing a aabbccDdP. Suppose a gene has two alleles, one of which is dominant over the other. An individual whose genotype is homozygous for the recessive allele has which of the following (circle one answer)? a. One copy of the allele that determines phenotype when present and one copy of the other allele. b. One copy of each of two alleles that both contribute equally to determining phenotype. c. Two copies of the allele that determines phenotype whenever the allele is present. d. Two copies of the allele whose effect is hidden unless the other allele is absent. A large population of land turtles on an isolated island has two alleles for a gene that determines shell thickness. The allele for thicker shells is dominant over the allele for thinner shells. The thinner-shell allele occurs at a frequency of 35%. What should the proportion of thicker-shelled turtles be in the population?Explanation / Answer
Answers
10) 6 unique gametes ( these will be A,a,B,C,c,d)
11) 25% will be carrier of recessive allele a.
13) answer is (d).
14) 65%