If two genes A and B are linked by uncorrected5 cm or mu wha

If two genes A and B are linked by (uncorrected)5 c.m. or m.u., what is the probability that a gamete with the genotype A b will be produced?

Solution

cM is a typical unit of recombinant frequency to measure genetic distance. Since, the distance between A and B is just 5 cM, this implies that the two alleles are very closely linked. The closer the alleles are linked, the lesser will be the chances of recombination.
The maximum probability for recombination is 50%, only with 50cM as measurable distance.
1cM = 1% recombination on map
5 cM = 5% recombination.
So there\'s only 5% probability that Ab gamete will be produced. Probabilities <50% recombination show that genes are linked.