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If a tall pea plant having red coloured flowers are crossed, they produce four types of plants in the ratio of 9 : 3 : 3 : 1. The genotype of the parents are (R-red flowered ; T - tall) is(A) RRTT × RRTT(B) RrTT × RrTT(C) RrTt × RrTt(D) RRTt × RRTt |
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Answer» (C) RrTt × RrTt The ratio produced is 9 : 3 : 3 : 1 which is also called the “dihybrid” ratio. Therefore, the genotype of the parents should be RrTt. (i.e. heterozygous for both the genes.) |
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