What is the main reason for some dwarf plants appearing when two hybrid tall plants are crossed?
Answer and explanation
Correct answer: Recessive information coming from both parents
The governing concept is segregation of alleles in a monohybrid cross. If tall hybrids are Tt × Tt, each parent can pass either T or t. The possible offspring combinations are TT, Tt, Tt, and tt. Only tt expresses dwarfness, so approximately one quarter of the offspring may be dwarf under the usual assumptions. Option A is correct because the dwarf form appears when a recessive allele is inherited from both parents; the other choices contradict genetics.
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What is the correct answer to this question?
Recessive information coming from both parents
Why is this the correct answer?
The governing concept is segregation of alleles in a monohybrid cross. If tall hybrids are Tt × Tt, each parent can pass either T or t. The possible offspring combinations are TT, Tt, Tt, and tt. Only tt expresses dwarfness, so approximately one quarter of the offspring may be dwarf under the usual assumptions. Option A is correct because the dwarf form appears when a recessive allele is inherited from both parents; the other choices contradict genetics.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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