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  4. If two pea plants having red (dominant) coloured flowers with unknown genotypes are crossed, 75 % of the flowers are red and 25 % are white. The genotypic constitution of the parents having red coloured flowers will

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Q. If two pea plants having red (dominant) coloured flowers with unknown genotypes are crossed, $75\%$ of the flowers are red and $25\%$ are white. The genotypic constitution of the parents having red coloured flowers will

Delhi UMET/DPMTDelhi UMET/DPMT 2011Principles of Inheritance and Variation

Solution:

When two pea plants having red (dominant)c coloured flowers with unknown genotype are crossed, the $75\%$ red and $25\%$ white flowered plants will be produced by following the law of Mendel. This is possible only if the parents are heterozygotes.

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