Question

Explain the given statements.
Test cross is a backcross but back cross is not necessarily a test cross.

Answer 1

Back cross:
Crossing of the F1 generation hybrid with any of the parents.

Test cross:
Crossing of the F1 generation with homozygous recessive parent.
So, test cross is a mode of back cross, whereas back cross isn't necessarily a test cross.

Answer 2

Dear Ishika,

◆ Explanation -

- Testcross is a crossing of a F1 hybrid with one of its recessive parent or individual with similar genetic makeup.

- Backcross is a crossing of a hybrid with one of its parents or individual with similar genetic makeup.

- If back cross involves crossing of F1 generation with recessive parent, it's also a test cross.

- But if back cross involves crossing of F1 generation with dominant parent, it's not a test cross.

- Therefore, test cross is a backcross but back cross is not necessarily a test cross.

Hope this helped you. Thanks for asking..