OBJECTIVE LIFE SCIENCE
GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In plants, tall (T) is dominant over short (t).If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring?You must show your work for full credit!
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100% Tt
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50% Tt, 50% tt
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75%Tt, 25%tt
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25%TT, 50%Tt, 25%tt
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Explanation:
Detailed explanation-1: -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’
Detailed explanation-2: -So, the correct option is ‘50%’.
Detailed explanation-3: -The tall pea plant should be crossed with a short pea plant. If the tall pea plant is homozygous, all of the offspring will be tall. If the tall pea plant is heterozygous, it is likely that about half of the offspring will be tall and half will be short.
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