Exam 3: Basic Principles of Heredity

Two gene loci, A and B, assort independently, and alleles A and B are dominant over alleles a and b.What is the probability of producing an AABB zygote from a cross AaBb × AaBb?

In a cross between AaBbCc and AaBbcc, what proportion of the offspring would be expected to be A_bbcc? (A_ means AA or Aa.)

If the characteristic followed in the pedigree is autosomal recessive, what is III-1's genotype?

The following cross produced 125 progeny: aaBbCcDd × AaBbccDD.Assume all the genes assort independently and that the uppercase letters represent dominant alleles. a.How many offspring are expected to express the phenotype ABCD? b.How many offspring are expected to have the genotype aaBBccDd? c.How many offspring are expected to have the genotype AaBbCcDd?

In Mendel's peas, yellow seeds are dominant to green.A pure-breeding yellow plant is crossed with a pure-breeding green plant.All of the offspring are yellow.If one of these yellow offspring is crossed with a green plant, what will be the expected proportion of plants with green seeds in the next generation?