GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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0%
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25%
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50%
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100%
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Detailed explanation-1: -The phenotypic ratio obtained is 75% red flower and 25% white flower which is not similar to the given question. To get a 50-50 ratio of both crosses we have to use the test cross method. In a test cross, crossover takes place between F2 hybrid and recessive plants.
Detailed explanation-2: -Heterozygous Rr (red) is crossed with homozygous red flowered plant.
Detailed explanation-3: -The crossing of a red flowered plant and a white flowered plant produces all the offspring with pink flowers. This cross illustrates red and white exhibit incomplete dominance. This situation occurs due to the blending of both the alleles.
Detailed explanation-4: -Alright, you know that the RR genotype gives red flowers. This happens in one combination, so 1/4 of the offspring will have red flowers.
Detailed explanation-5: -All (100%) of the offspring from the cross of a homozygous red-flowered plant with a homozygous white-flowered plant will have red flowers.