HEREDITY
BACKCROSS OR TESTCROSS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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If you cross a homozygous dominant Tall plant with a homozygous recessive (short) plant, which of the following allele combinations would be correct?
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TT X tt
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TT X Tt
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Tt X Tt
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tt X tt
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Explanation:
Detailed explanation-1: -As T is dominant over t, therefore all the plants will be tall and no plant will be short. TT is homozygous tall and Tt is the heterozygous tall. Hence option A is correct.
Detailed explanation-2: -In F2 generation, the tall and dwarf plants will be produced in 3 : 1 ratio. Out of the three tall plants, one tall plant will be homozygous tall (TT) and two tall plants will be heterozygous tall (Tt).
Detailed explanation-3: -In the given scenario, we can represent the homozygous tall pea plant as AA, while the homozygous short pea plant is represented by aa. These correspond to the types of alleles. If we cross the two together
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