Pure breed pea plants with Red coloured flowers are crossed with pure breed pea plants with white coloured flowers. The plants obtained in F1 are self pollinated to obtain F2.What will be the colour of flowers in F1?
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Answer:
A cross between pure breeding red (RR) and white (rr) flowered plants produces heterozygous red (Rr) offspring in first filial generation. Heterozygous red (Rr) offspring produce two types of gametes: 50% with R allele and 50% with r. Random fertilization of gametes with R and r alleles produces red and white flowered offspring in 3:1 ratio.
gametes Rr
Rr R r
R RR (red) Rr (red)
r Rr (red) rr (white)
This makes option B correct answer
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