Expert answer:BIS 101 – What is the phenotype of the female leop

  

Solved by a verified expert:In leopards, the SPT gene drives formation of spots in the fur. if SPT is not expressed or mutant it results in no spots. SPT is ahapplosufficient gene that ismaternally imprinted. Another gene, YLW, produces yellow pigment in the fur. if YLW is mutant or not expressed it results in white fur. YLW is ahapploinsufficient gene that ispaternally imprinted. A female leopard is heterozygous for null mutations in both the YLW and SPT genes with the null alleles in trans. She inherited the null YLW mutation from her mother. 1.What is the phenotype of the female leopard? 2. If the female leopard mates with a male leopard that is homozygous for the wild type alleles of both SPT and YLW. What are the expected progeny phenotypes if there is no crossing over?

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