What does the three-to-one result in the second generation of a monohybrid cross show?
Answer and explanation
Correct answer: Dominant and recessive traits can separate and recombine
In a monohybrid cross of two heterozygotes, Tt × Tt, the possible genotypes are TT, Tt, Tt, and tt. Three offspring show the dominant phenotype and one shows the recessive phenotype, giving the expected 3:1 phenotypic ratio. This demonstrates segregation of alleles during gamete formation and their recombination at fertilisation. Thus option B is correct.
Frequently asked questions
What is the correct answer to this question?
Dominant and recessive traits can separate and recombine
Why is this the correct answer?
In a monohybrid cross of two heterozygotes, Tt × Tt, the possible genotypes are TT, Tt, Tt, and tt. Three offspring show the dominant phenotype and one shows the recessive phenotype, giving the expected 3:1 phenotypic ratio. This demonstrates segregation of alleles during gamete formation and their recombination at fertilisation. Thus option B is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Control and Coordination. Topic: Plant hormones.
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