In: Biology
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).
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: