Mendel crossed a pure white-flowered recessive pea plant with a dominant pure red-flowered plant. The first generation of hybrids from the cross should show
A
50% white-flowered and 50% red-flowered plants
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B
All red-flowered plants
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C
75% red-flowered and 25% white-flowered plants
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D
All white-flowered plants
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Solution
The correct option is A All red-flowered plants Pure white coloured recessive pea plant - rr Pure red coloured dominant pea plant - RR Cross between both: RR X rr ---------> Rr (Heterozygous Red) According to Mendel's law of dominance, the dominant character will express even if it is heterozygous.