Question

Which individuals should be crossed to carry out a complementation test?

a)An individual heterozygous for both mutations and an individual homozygous for both mutations.
b)Two individuals heterozygous for different mutations.
c)Two individuals homozygous for the same recessive mutations.
d)An individual that is wild-type and an individual homozygous for a recessive mutation.
e)Two individuals homozygous for different mutations

Answer 1

To execute a complementation test, individuals homozygous for different mutations should be crossed. This helps determine if the mutations are in the same gene or in different genes. A test cross is different, helping to reveal the genotype of an individual expressing a dominant trait.

Step-by-step explanation:

To carry out a complementation test, two individuals that are homozygous for different mutations are crossed (e) Two individuals homozygous for different mutations). The purpose of a complementation test is to determine whether two mutations causing a similar phenotype are in the same gene (they do not complement) or in different genes (they complement).

A test cross is used to determine whether an organism expressing a dominant trait is homozygous dominant or heterozygous for that trait. It involves crossing a dominant expressing individual with an unknown genotype with an individual that is homozygous recessive for the trait in question. The progeny phenotypes from this cross indicate the genotype of the unknown parent.