You are trying to determine if two traits are linked or are located on separate

Question

You are trying to determine if two traits are linked or are located on separate chromosomes. The A locus controls leaf color and A is completely dominant to a, and produces purple leaves whereas aa produces yellow leaves. The B locus controls leaf shape and B is completely dominant and produces square leaves whereas bb produces round leaves. You cross an individual that is AaBb with an individual that is homozygous recessive at both loci.

a. Assuming independent assortment (not linked), what are the expected phenotype proportions?

Explanation / Answer

Answer:

AaBb (yellow, square leaves) x aabb (purple, round leaves)----------Parents

The expected phenotype proportions: 25% : 25% : 25% : 25%

ab AB AaBb (Yellow, square leaves) 25% Ab Aabb (Yellow, round leaves) 25% aB aaBb (Purple, square leaves) 25% ab aabb (purple, round leaves) 25%

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