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Principles of Inheritance question bank (Biology)

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Q1.

Two double heterozygous plants (PpQq), derived from two different pairs of true-breeding parents of unknown genotype, produce gametes in the proportions as given below.
Which one of the following options correctly represents the genotype of the parents?

(A)

$\mathrm{R} 1=\mathrm{ppQQ} ; \mathrm{R} 2=\mathrm{PPqq} ; \mathrm{R} 3=\mathrm{PPQQ} ; \mathrm{R} 4=\mathrm{ppqq}$

(B)

$\mathrm{R} 1=\mathrm{PPQQ} ; \mathrm{R} 2=\mathrm{ppqq} ; \mathrm{R} 3=\mathrm{ppQQ} ; \mathrm{R} 4=\mathrm{PPqq}$

(C)

$\mathrm{R} 1=\mathrm{ppQQ} ; \mathrm{R} 2=\mathrm{PPqq} ; \mathrm{R} 3=\mathrm{PPqq} ; \mathrm{R} 4=\mathrm{ppQQ}$

(D)

$\mathrm{R} 1=\mathrm{PPQQ} ; \mathrm{R} 2=\mathrm{ppqq} ; \mathrm{R} 3=\mathrm{ppqq} ; \mathrm{R} 4=\mathrm{PPQQ}$

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Q2.

In a haplodiploid ant species, sons are haploid and produced from unfertilized eggs, while daughters are diploid and produced from fertilized eggs. A single queen establishes a colony after mating with three different unrelated males. The queen uses the sperm from all three males equally to produce her female offspring. The average genetic relatedness between two randomly selected female offspring in this colony will be:

(A)

$0.750$

(B)

$0.500$

(C)

$0.333$

(D)

$0.417$

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