Question

Test cross is used to

• A. check heterozygosity in $F_1$ generation
• B. check heterozygosity in $F_2$ generation
• C. check independent assortment
• D. check segregation

Answer 1

Answer: (A)

In genetics, a test cross, first introduced by Gregor Mendel, involves the breeding of a dominant trait individual with a recessive individual, in order to determine the zygosity of the former by analysing proportions of offspring with the recessive phenotype. It checks heterozygosity in $F_1$ generation.