Locus 1 controls fur color in mice. Allele B for black and allele b for brown ar

Question

Locus 1 controls fur color in mice. Allele B for black and allele b for brown are codominant. Locus 2 controls the expression of alleles at locus 1. Allele Q allows expression and allele q prevents expression so that genotypes qq have white fur. The loci are on nonhomologous autosomes and so, they segregate independently of each other and alleles and all genotypic classes exhibit 100 % penetrance and full expressivity. Genotypes BbQq and BbQq mate and produce 300 progeny.

__________________________________________: the expected ratio among the phenotypic classes (provide the class and the respective proportion of the total progeny).

________: the expected number of genotypic classes expected among the progeny.

________: the number (not a fraction) of progeny expected to be true-breeding for fur color. Show your work.

State the null hypothesis that would be considered with a Chi-Square test in question 6:

_________________________________________________________________________________________

_________________________________________________________________________________________

________________________________________________________________________________________.

Explanation / Answer

1.BbQq x BbQq

The gameted would be BQ, Bq, bQ, bq

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