What does the 3:1 result in the second generation of a monohybrid pea cross show?
Answer and explanation
Correct answer: Dominant and recessive traits remain as separate inherited units
The governing concept is Mendel’s law of segregation. In a monohybrid cross such as Tt × Tt, the alleles separate during gamete formation, producing TT, Tt, Tt and tt in a 1:2:1 genotypic ratio. Because T is dominant, three offspring show the dominant phenotype and one shows the recessive phenotype. Thus option A is correct; the other choices incorrectly describe blending, absence of variation or chromosome formation.
Frequently asked questions
What is the correct answer to this question?
Dominant and recessive traits remain as separate inherited units
Why is this the correct answer?
The governing concept is Mendel’s law of segregation. In a monohybrid cross such as Tt × Tt, the alleles separate during gamete formation, producing TT, Tt, Tt and tt in a 1:2:1 genotypic ratio. Because T is dominant, three offspring show the dominant phenotype and one shows the recessive phenotype. Thus option A is correct; the other choices incorrectly describe blending, absence of variation or chromosome formation.
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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