In Mendel's monohybrid cross, the three-to-one result in the second generation most strongly supports which principle?
Answer and explanation
Correct answer: Segregation of trait information
The governing principle is Mendel’s law of segregation. In a cross such as Tt × Tt, the two alleles separate during gamete formation. Random fusion produces TT, Tt, Tt, and tt in a 1:2:1 genotype ratio; because T is dominant, the visible phenotypes occur in a 3 tall:1 dwarf ratio. Therefore option B is correct. Independent assortment concerns the inheritance of two different traits, not the basic one-trait 3:1 result.
Frequently asked questions
What is the correct answer to this question?
Segregation of trait information
Why is this the correct answer?
The governing principle is Mendel’s law of segregation. In a cross such as Tt × Tt, the two alleles separate during gamete formation. Random fusion produces TT, Tt, Tt, and tt in a 1:2:1 genotype ratio; because T is dominant, the visible phenotypes occur in a 3 tall:1 dwarf ratio. Therefore option B is correct. Independent assortment concerns the inheritance of two different traits, not the basic one-trait 3:1 result.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Heredity and Evolution. Topic: Mendel’s laws.
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