Biology Practice Problems Independent Assortment Practice Problems Solution: In guineapigs, a cross between black furred and br...

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Solution: In guineapigs, a cross between black furred and brown furred parenrs gives offspring with 100% black fur. A cross between a long furred and short furred parents gives offspring with 100% short fur. What would be the genotypic and phenotypic ratios predicted for a cross between a heterozygous black furred, long furred male and a brown furred, homozygous short furred female?

Problem

In guineapigs, a cross between black furred and brown furred parenrs gives offspring with 100% black fur. A cross between a long furred and short furred parents gives offspring with 100% short fur. What would be the genotypic and phenotypic ratios predicted for a cross between a heterozygous black furred, long furred male and a brown furred, homozygous short furred female?

Solution

In this problem, there are two traits under question and it is assumed that the genes that express these traits assort independently. In fur color, the black allele, B, is dominant to the brown allele, b. In terms of fur length, short fur, S, is dominant to long fur, s. The given male is a heterozygous black (Bb) and long furred (ss) while the female is brown (bb) and homozygous short (ss) furred.

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