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In corn, the following allele pairs are on chromosome 9: colored (C) vs. white (c) aleurone...

In corn, the following allele pairs are on chromosome 9: colored (C) vs. white (c) aleurone color; starchy (Wx) vs. waxy (wx) endosperm; and full (Sh) vs. shrunken (sh) endosperm. F1 plants heterozygous for all three alleles were test crossed; the resulting progeny had the following phenotypic ratios:


colored, waxy, shrunken 116

colored, starchy, full 601

colored, starchy, shrunken 2538

white, starchy, shrunken 4

white, starchy, full 113

white, waxy, full 2708

white, waxy, shrunken 626

colored, waxy, full _____2

6708

Determine the order of and distances between the three genes.  Also determine the coefficient of

coincidence (C) and the interference (I).

Solutions

Expert Solution

The greater number are of parental type and the lowest number are of double cross over type. The middle gene is swapped during the double cross over.

Please look in the image for solution:

gladiator answered 1 year ago
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