GENETICS AND EVOLUTION
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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100% TT
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100% Tt
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25% TT-50% Tt-25% tt
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50% tt 50% TT-50% tt
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Detailed explanation-1: -So, the correct option is ‘50%’.
Detailed explanation-2: -Answer and Explanation: A heterozygous tall plant will have a genotype of Tt. T is mainly the dominant allele and will actually rule over the t allele, which is recessive.
Detailed explanation-3: -In pea plants height is characterized by having two alleles T(tall) and t(dwarf). Since heterozygous tall pea plant (Tt is the genotype in heterozygous) is crossed with a dwarf pea plant (tt is the genotype in dwarf).
Detailed explanation-4: -In a cross between heterozygous tall plants (Tt) and a homozygous dwarf plant (tt), the ratio in the offspring shall be 1 tall : 1 dwarf. This is because the heterozygous plant will make two types of gametes, one type having T allele and the other having t allele. Hence, the correct answer is ‘1 tall : 1 dwarf’