Question: A woman is heterozygous for three X-linked loci: AaBbDd. She has
seven sons with the following ge…
A woman is heterozygous for three X-linked loci: AaBbDd. She has
seven sons with the following genotypes: (7 marks)
two are X ABd Y
three are X abD Y
one is X ABD Y
one is X Abd Y
a) What is the most likely combination of alleles on each of the
mother’s X chromosomes?
b) Which of the seven sons is/are the result of recombination?
Between which genes did the crossover occur in the mother’s oocyte
to create each recombinant X?
– Please between which genes did the crossover occur in the
mother’s oocyte
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