Question

Back cross is

• A. $F_1\times$ Any parent
• B. $F_1\times$ Recessive parent
• C. $F_1\times$ Dominant parent
• D. All of the above

Answer 1

The correct option is D All of the above

When F1 individuals are crossed with one of the two parents from which they were derived, then such a cross is called a back cross.

In such backcrosses, when F1 is backcrossed with the parent having dominant characters (phenotype), no recessive individuals are obtained. Again when crossed with the recessive parent, both phenotypes appear in the progeny.

Test cross- A test cross is a cross used to test whether an individual is homozygous ie pure or heterozygous ie hybrid. It is always crossed with a recessive parent.

A.F₁ x F₁ – Interspecific cross.

B.F₁ x recessive parent – Test cross

C.F₁ x Dominant parent – Back cross

D.F₁ x any parent – Back cross

So, the correct option is All of the above.