A test cross can be used to do all of the following except
A)determine whether an individual that displays a dominant phenotype is homozygous for the trait.
B)determine whether an individual that displays a dominant phenotype is heterozygous for the trait.
C)gather genotype information from phenotype information.
D)identify the chromosome on which a gene is located.

Question

Quizplus · Accepted Answer

A test cross involves crossing an individual displaying a dominant trait with a homozygous recessive individual to determine the genotype of the dominant individual. This can help determine whether the dominant individual is heterozygous or homozygous for the trait, and gather genotype information from phenotype information. However, it cannot be used to identify the specific chromosome on which a gene is located. That would require a different type of genetic analysis, such as mapping or linkage analysis.

A Test Cross Can Be Used to Do All of the Following