NEET BIOLOGY

Detailed explanation-1: -A test cross is a cross between an individual with an unknown genotype with a homozygous recessive genotype. It is a method to determine the genotype of an organism. The genetic makeup of an individual is known as its genotype. The genotype exhibits the alleles or the gene pattern carried by an organism.

Detailed explanation-2: -A testcross can be used to determine the organism’s genotype. In a testcross, the individual with the unknown genotype is crossed with a homozygous recessive individual (Figure below).

Detailed explanation-3: -A test cross is an experiment that is used to find out the genotype of a dominant plant of the F2 generation. It is performed by crossing the dominant offspring with the homozygous recessive parent.

Detailed explanation-4: -We can determine the genotype of the plant by observing the phenotypes of the offsprings resulting from test cross.