1. Tardigrade
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  3. Biology
  4. Assertion: Test cross is the cross between the F1 progeny and either of the parent types. Reason: Back cross is the cross between F1 progeny and the double recessive genotype.

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Q. Assertion : Test cross is the cross between the $F_1$ progeny and either of the parent types.
Reason : Back cross is the cross between $F_1$ progeny and the double recessive genotype.

Principles of Inheritance and Variation

Solution:

A cross of $F_1$ hybrid with either of the two parents is known as back cross. Crossing of $F_1$ individual having dominant phenotype with its homozygous recessive parent is called test cross.