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M is a marker locus that you are using to look for QTLs for nose hair. You cross an M1M2 father with an M2M3 mother and ?nd that the mean number of nosehairs in different marker genotypes in their offspring are as follows:

M1M2 50 M1M3 70 M2M2 50 M2M3 70
(a) Is there evidence of a QTL linked to this marker in the father?
(b) Is there evidence of a QTL linked to this marker in the mother?
(c) How do you account for the discrepancy between (a) and (b)?

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