Question

What is back cross and test cross?

Answer 1

Backcross:

1. It is the crossing of a hybrid with one of its parents, or an adult genetically identical to the parent, to achieve offspring with a genetic identity closer to parents.
2. It is generally used in horticulture, animal breeding, & gene knockout organism development.
3. It is a cross between the F1 individual and either of 2 parents.
4. It is generally used to improve a variety or breed by making a number of backcrosses.

Test Cross:

1. It is done between the first filial generation and the recessive parent.
2. It is carried out to do to know the genotype of the first filial individuals to know whether they are homozygous or heterozygous.
3. All test crosses are be said as backcrosses but not vice versa.