two sheep herds are very inbred, each herd had a fiber diameter vairance of 12 m

Question

two sheep herds are very inbred, each herd had a fiber diameter vairance of 12 microns squared. one of the herds had wool averaging 17.2 microns and the other had an average of 25 microns. these two herdso sheep were then inter-crossed and their hybrids had an average of 21.1 microns and a variance of 12 microns squared. then the hybrids mated at random and their offspring had an average fiber diamter of 21.1 microns and a variance of 13.6 microns squared. estimate the minimum effective numner of genetic loci that are responsiblr for these differences betweens the inbred herds.

Explanation / Answer

The minimum effective number of genetic loci that are responsible for these differences between the inbred herds is (1/4)1 because the total number of phenotypic traits here is four, if two genes influence the total number of phenotypic trait will be (1/4)2 = 1/16

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