Question

State whether the following statement is true or false.

A cross between F₁ hybrid and its homozygous recessive plant is called test cross.

Answer 1

This statement is true.

Explanation:

 A test cross is performed by crossing an individual showing the dominant phenotype (commonly an F₁ hybrid of unknown genotype) with a homozygous recessive individual. The purpose of this cross is to determine whether the dominant phenotype individual is homozygous or heterozygous. The offspring phenotypes resulting from this cross reveal the genotype of the tested individual because recessive phenotypes will only appear if the tested individual is heterozygous. Thus, crossing an F₁ hybrid with a homozygous recessive parent is exactly what defines a test cross.