Question: A complementation test is used to determine whether or not two recessive mutations with the same …

A complementation test is used to determine whether or not two
recessive mutations with the same phenotype are in the same gene.
For example, imagine that you have several true breeding strains of
peas with white flowers. Strain 1 crossed with Strain 2 produces
all white flowered progeny, but Strain 1 or 2 crossed with Strain 3
produces purple flowered progeny. We could explain this as Strain 1
and 2 both carrying recessive mutations in gene A (we can call the
alleles a1 and a2), while Strain 3 carries a recessive mutation in
gene B (we can call it b).

a. Describe how two different mutations in the same gene could
have the same effect (e.g. result in white flowers). b. Describe
how two mutations in different genes could have the same effect. c.
Write out the full genotypes for Strains 1, 2, and 3 for both genes
(A and B). d. Make two Punnett squares, one showing Strain 1 x
Strain 2, and one showing Strain 1 x Strain 3. e. In your own
words, explain the concept of complementation.