GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The height of pea plants from a cross between parent plants heterozygous for height in which tall is dominant would be
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all short.
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all tall.
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1 tall:3 short.
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3 tall:1 short.
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Explanation:
Detailed explanation-1: -Out of the offspring produced, 50% will be tall and 50% will be dwarf.
Detailed explanation-2: -A heterozygous tall pea plant is crossed with the pure dwarf pea plant. The phenotypic ratio of breeding tall pea plants to breeding dwarf pea plants shall be 1:1.
Detailed explanation-3: -In pea plants, tall (T) plants are dominant over short (t) plants.
Detailed explanation-4: -As shown in the figure a cross between two heterozygous tall plants results in 25% homozygous tall, 50% heterozygous tall and 25% dwarf plants. Thus the correct answer is option C.
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