In a diploid invertebrate, genes D and E are closely linked. Single crossovers b
ID: 175953 • Letter: I
Question
In a diploid invertebrate, genes D and E are closely linked. Single crossovers between these two genes occurs only in one out of 40 meioses, and multiple crossovers are never observed. If an individual has the genotype D e/d E, what percentage of its gametes are expected to be recombinant (either DE or de)? The answer is: 1.25% can someone explain how? In a diploid invertebrate, genes D and E are closely linked. Single crossovers between these two genes occurs only in one out of 40 meioses, and multiple crossovers are never observed. If an individual has the genotype D e/d E, what percentage of its gametes are expected to be recombinant (either DE or de)? The answer is: 1.25% can someone explain how?Explanation / Answer
Answer:
Recombination frequency = 1/40 = 0.025 = 2.5%
Parental combinaiton of gamets =DE or de = 100% - 2.5% = 97.5%
Recombinant gametes = De or dE = 2.5%
The percentage of gametes, De = 2.5/2 = 1.25%
The percentage of gametes, dE = 2.5/2 = 1.25%