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order of the loci in the chromosome

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If a woman is heterozygous for three x-linked loci AaBbDd, She has seven sons with follow genotypes

Two are X^ABd Y
three are X^abDY
one is X^ABD Y
one is X^Abd Y

1) what is most likely combination of alleles on each the mothers chromosomes
Answer:
abD
ABd

2) which is the sons are recombination, bw what genes is the cross over
answer:
abD is result of combination
crossing over between B and D

3) list other possible recombinant genotypes
answer:
abd
aBd
abD

please verify answers

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Solution Summary

The order of the loci in the chromosomes is examined.

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You look to have answered the first part of the question very well. With multiple sons having ABd and abD it is likely that those are the two combinations of alleles on the maternal chromosomes.

For the next two parts however, you need to take a guess at the order of the loci in the chromosome: i.e, does it make sense to have a crossover between the B and D sites? Remember ...

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