A woman is heterozygous for three X-linked loci: AaBbDd. She has seven sons with the following genotypes: 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? c) List the other possible recombinant genotypes, which have not appeared in these sons.