The genotypes and numbers of progeny resulting from a testcross are as follows: t+g+ l+ 72 tgl 69 t+gl 21 tg+l+ 18 t+gl+ 9 tg+l 8 t+g+l 2 tgl+ 1 Total 200 Calculate the genetic distance between genes g and l
What will be an ideal response?
The distance would be the sum of the single crossovers in the region between g and l and the number of double crossovers divided by the total number of progeny. Thus, (9 + 8 ) + (2 + 1)/200 = 0.1 or 10%. This is the recombination frequency of genes g and l. This distance between them is 10.0 map units.
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