OBJECTIVE LIFE SCIENCE
GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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short
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tall
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medium sized
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neither tall or short
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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. Q.
Detailed explanation-2: -Cross breeding TT with tt plants produces Tt plants in the first or F1 generation. The F1 plants receive a ‘T’ allele from the tall parent and a ‘t’ allele from the short parent. The F1 plants are tall because the ‘T’ allele is expressed and “cover up” the ‘t’ allele.
Detailed explanation-3: -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. Which outcome below would indicate that the tall parent plant was heterozygous? All of the offspring are short.