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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A cross between two tall garden pea plants produced 314 tall plants and 98 short plants. What genotypes are the parents?
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TT and tt
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TT and Tt
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Tt and Tt
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TT and TT
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Explanation:
Detailed explanation-1: -The possible genotypes of the parents are TT, TT and TT, Tt.
Detailed explanation-2: -Final answer: A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because tallness is the dominant trait.
Detailed explanation-3: -Pea plants are tall if they have the genotype TT or Tt, and they are short if they have genotype tt.
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.
Detailed explanation-5: -a homozygous tall pea plant will have the genotype TT. A homozygous short pea plant will have the genotype tt.
There is 1 question to complete.