SATHEE: Principles of Inheritance and Variation Question 48

Principles of Inheritance and Variation Question 48

48. Test cross involves

[2006]

(a) crossing between two $F_{1}$ hybrids

(b) crossing the $F_{1}$ hybrid with a double recessive genotype

(d) crossing between two genotypes with recessive trait

Show Answer

Answer : b

Hints & Solution

(b) A cross of $F_{1}$ hybrid with its recessive homozygous parent is called the test cross. It is done to determine the genotype of a given plant. If the given plant has homozygous dominant traits then on test cross it gives all dominant trait plants but if it is heterozygous dominant then it gives dominant and recessive phenotypes in $1 : 1$ ratio.

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Principles of Inheritance and Variation Question 48

48. Test cross involves

Answer : b

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