GPB MCQ Quiz 165 for ICAR JRF/SRF/ARS Exam Preparation

Back cross is

A) When heterozygous individuals of F₁ generation are crossed with one of the parental type (P) individuals

B) When the F₁ hybrid individuals are crossed with dominant homozygous parent

C) When F₁ hybrid individuals are crossed with homozygous recessive parent

D) None of the above

Explanation: A back cross involves crossing F₁ hybrid with the homozygous recessive parent to determine the genotype.

Test cross is

A) When the F₁ hybrid individuals are crossed with dominant homozygous parent

B) When F₁ hybrid individuals are crossed with homozygous recessive parent

C) When heterozygous individuals of F₁ generation are crossed with one of the parental type (P) individuals

D) None of the above

Explanation: A test cross is performed by crossing the F₁ hybrid with a homozygous recessive to determine unknown genotypes.

Out cross is

A) When the F₁ hybrid individuals are crossed with homozygous parent

B) When heterozygous individuals of F₁ generation are crossed with one of the parental type (P) individuals

C) When F₁ hybrid individuals are crossed with homozygous recessive parent

D) None of the above

Explanation: Out crossing involves crossing an F₁ individual with a parental type to maintain genetic diversity.

From the result of dihybrid experiment Mendel concluded

A) The alleles of one set behaved independently with respect to those of the other set at the time of combination

B) The members of two sets of allele segregated in F₂ generation

C) Both

D) None of the above

Explanation: Mendel concluded that alleles segregate independently (law of independent assortment) and the segregation occurs in F₂ generation.

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