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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50%
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25%
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100%
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75%
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Detailed explanation-1: -So, the correct option is ‘Pink and white in 1 : 1 ratio’.
Detailed explanation-2: -Figure 21: A cross between a red and white snapdragon will yield 100% pink offspring. This pattern of inheritance is described as incomplete dominance, meaning that neither of the alleles is completely dominant over the other: both alleles can be seen at the same time.
Detailed explanation-3: -In snapdragons, when red flowers are crossed with white flowers, the offspring will have pink flowers. This an example of incomplete dominance since no allele show dominance in the heterozygous condition (a clear deviation from the law of dominance, where one allele shows dominance in heterozygous condition).
Detailed explanation-4: -So, the correct option is ‘25%’.
Detailed explanation-5: -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.