Question

define and design of a test cross.​

Answer 1

The cross b/w F1 generation nd recessive parent is known as test cross.

Explanation:

RR × rr

|

Rr - F1 generation

..

then Cross " Rr with rr ".

Answer 2

Answer:

• Test cross is a cross between an organism with unknown genotype and a recessive parent. It is used to determine whether the individual is homozygous or heterozygous for a trait.  

• If the progenies produced by a test cross show 50% dominant trait and 50% recessive trait, then the unknown individual is heterozygous for a trait. On the other hand, if the progeny produced shows dominant trait, then the unknown individual is homozygous for a trait.