Question

The following testcross produces the progeny shown: Aa Bb x aa bb → 10 Aa Bb, 40 Aa bb, 40 aa Bb, 10 aa bb. What is the percent recombination between the A and B loci?

A)10%
B)20%
C)40%
D)50%
E)80%

Answer 1

The percent recombination between the A and B loci is 80%.

Step-by-step explanation:

The percent recombination between the A and B loci can be calculated by analyzing the genotypes and genotypic proportions of the progeny produced from the testcross. In the given testcross, the progeny produced are 10 Aa Bb, 40 Aa bb, 40 aa Bb, and 10 aa bb.

To calculate the percent recombination, we need to determine the number of offspring that have recombinant genotypes (Aa bb and aa Bb) and divide it by the total number of offspring. In this case, the number of offspring with recombinant genotypes is 40 + 40 = 80, and the total number of offspring is 10 + 40 + 40 + 10 = 100.

So, the percent recombination between the A and B loci is (80/100) * 100 = 80%.