The following is a cross between two individuals with the genotypes as indicated for four unlinked...

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Biology

The following is a cross between two individuals with thegenotypes as indicated for four unlinked autosomal genes.

Aa Bb Cc dd X aa BB Cc Dd

1. For each gene, assume the capital letter indicates a dominantallele and the lower case letter (small) indicates a recessiveallele. What proportion of the progeny would have the followingoverall phenotype: recessive phenotype for A, dominant phenotypefor B, dominant phenotype for C, and recessive phenotype for D?

2. Now assume that, unlike part 1, the two alleles of gene Bshow incomplete dominance and that the two alleles of gene C alsoshow incomplete dominance. Like in part 1, for the alleles of genesA and D the capital letter is dominant and the lower case (small)letter is recessive. In this situation, what would be theproportion of the progeny with the following overall phenotype:recessive phenotype for A, dominant phenotype for B, dominantphenotype for C, and recessive phenotype for D?

3. Explain the differences between the terms dominant,incompletely dominant, and co-dominant.

Answer & Explanation Solved by verified expert
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1 Aa Bb Cc dd X aa BB Cc Ddlets divide this into four different crossesAa aaAaaAaaaprobability of getting recessive phenotype for A probability ofgetting aa number of aatotal number 12Bb BBBbBBBBbprobability of getting dominant phenotype for B probability ofgetting progeny with B allele number of progeny with Balleletotal number221Cc CcCcCCCCccCcccprobability of getting dominant phenotype for C probability ofgetting progeny with C    See Answer
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