Question

In the following testcross, genes a and b are 20 cM apart, and genes b and care 10 cM apart: a + c/ +b+ X abc/ abc. If the coefficient of coincidence is 0.5 over this interval on the linkage map, how many triply homozygous recessive individuals are expected among 1000 progeny

Answer 1

Answer:

0

Explanation:

when one crossover is already occurred in a particular region then another crossover in the same region may inhibited -- interference occurs

frequency of crossing over $\alpha$ physical distance b/w the loci of chromosomes.