Question

Sol.(a) [Key Concept: Gene Distance — Recombination Frequency] Distance between genes and percentage of recombination show a DIRECT RELATIONSHIP. The farther apart two genes are on a chromosome, the higher the probability of a crossover occurring between them, and thus the higher the recombination frequency. This forms the basis of genetic linkage mapping (1 map unit = 1 centimorgan = 1% recombination). Closely linked genes have LOW recombination; distantly linked/unlinked genes have HIGH recombination (up to 50%).