HEREDITY
MONOHYBRID CROSS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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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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Detailed explanation-1: -Since, the parents are homozygous tall (TT) and dwarf (tt), the progeny of F1 generation will be hybrids (Tt). 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-2: -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’
Detailed explanation-3: -100 % Hint: Heterozygous is a condition when there are two different traits of a particular gene.
Detailed explanation-4: -So, the correct option is ‘50%’.
Detailed explanation-5: -Answer and Explanation: The phenotypic characteristics of offsprings are that all the plants will be tall plants. TT is a tall plant. Tt will also be a tall plant.