HEREDITY
LAW OF DOMINANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What are the genotypes for a dominant phenotype of “A Tall Head".
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Tall
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Short
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TT, Tt
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tt
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Explanation:
Detailed explanation-1: -As the given genotype is Tt, it’s a heterozygous condition and in heterozygous condition the dominant trait (T-tall) will express itself. Hence, the phenotype of Tt will be a tall plant.
Detailed explanation-2: -Being a hybrid Tt shows dominant phenotype and tt is the recessive parent; it is a test cross.
Detailed explanation-3: -When a heterozygous plant is self crossed with itself in a monohybrid cross, the genotypic ratio obtained is TT:Tt:tt = 1:2:1.
Detailed explanation-4: -Pea plants are tall if they have the genotype TT or Tt, and they are short if they have genotype tt. A tall plant is mated with a short plant.
Detailed explanation-5: -So, the correct option is ‘50%’.
There is 1 question to complete.