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20 March, 05:43

Based on the law of segregation, what proportion of the F2 plants (which are in the ratio 1 RR : 2 Rr : 1 rr) would be expected to produce F3 progeny phenotypes in a ratio of 3 dominant : 1 recessive? S

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  1. 20 March, 06:03
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    2/4 or 1/2 of the F2 plants

    Explanation:

    According to the given information, a cross between two heterozygous monohybrid with genotype "Rr" gives a F2 progeny. The genotype ratio of the obtained F2 progeny is 1 RR : 2 Rr : 1 rr.

    Out of the total F2 progeny, 2/4 F2 plants are heterozygous dominant for the studied gene. Self crossing between two of these plants would produce the F3 progeny in 3 dominant: 1 recessive ratio.
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