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ICSE Class 10 Biology Question 27 of 30

Solved 2023 Question Paper ICSE Class 10 Biology — Question 27

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Question 8(ii)

A pure breeding red flower variety of pea plant (RR) is crossed with a pure breeding white flower variety of pea plant (rr). Draw a Punnett square to find out the Phenotypic and Genotypic ratios of the progeny belonging to the F2 generation.

Answer
Rr
RRRRr
rRrrr

Phenotypic Ratio: 3:1
RR,Rr will be red flowering and rr will be white flowering plant.

Genotypic Ratio: 1:2:1
RR(Dominant homozygous), Rr (Dominant heterozygous), rr(Recessive homozygous)