CELL DIVISION
MEIOSIS AND GENETIC VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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75% red and 25% white
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25% red and 75% white
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100 White
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50% red 50% red
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Detailed explanation-1: -When a heterozygous purple flower (Rr) is crossed with a recessive white flower (rr), the progeny obtained are with the genotype (Rr), (Rr), (rr) and (rr). So, 50% of the progeny are with purple flowers (Rr) and 50% are with white flowers (rr).
Detailed explanation-2: -The genotypes of the offspring can be determined by crossing the red flowers, RR, with the white flowers, rr. Offspring: all offspring are Rr. Incomplete dominance means that neither color shows dominance in the hybrid generation.
Detailed explanation-3: -There was a 3:1 ratio of purple:white flowers in generation F2 because the “masked” (recessive) genes from the F1 generation were allowed to pair, however they were only allowed to pair one time leaving the other three times to appear with purple flowers.
Detailed explanation-4: -When red flowered plants are crossed with white flowered plants, the F2 generation gives a ratio of 3:1.