In marsupials like the opposum or kangaroo, X inactivation selectively inactivates the paternal X chromosome.a. Predict the possible coat colors of the progeny ofboth sexes if a female marsupial homozygous for amutant allele of an X-linked coat color gene wasmated with a male hemizygous for the alternativewild-type alleles of this gene.b. Predict the possible coat colors of progeny of bothsexes if a male marsupial hemizygous for an alleleof an X-linked coat color gene was mated with afemale homozygous for the alternative wild-typeallele of this gene.c. Why are the terms recessive and dominant not useful in describing the alleles of X-linked coat colorgenes in marsupials?d. Why would marsupials heterozygous for twoalleles of an X-linked coat color gene not havepatches of fur of two different colors as did the tortoiseshell cats described in the previous problem?51. The pedigree diagram below shows a family in which
In marsupials like the opposum or kangaroo, X inactivation selectively inactivates the paternal X chromosome.
a. Predict the possible coat colors of the progeny of
both sexes if a female marsupial homozygous for a
mutant allele of an X-linked coat color gene was
mated with a male hemizygous for the alternative
wild-type alleles of this gene.
b. Predict the possible coat colors of progeny of both
sexes if a male marsupial hemizygous for an allele
of an X-linked coat color gene was mated with a
female homozygous for the alternative wild-type
allele of this gene.
c. Why are the terms recessive and dominant not useful in describing the alleles of X-linked coat color
genes in marsupials?
d. Why would marsupials heterozygous for two
alleles of an X-linked coat color gene not have
patches of fur of two different colors as did the tortoiseshell cats described in the previous problem?
51. The pedigree diagram below shows a family in which
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