Why can new trait combinations appear in the second generation of a dihybrid cross?
Answer and explanation
Correct answer: Forms of two traits can assort independently and recombine
The governing concept is independent assortment during gamete formation. In a dihybrid cross, each parent can produce different gamete types because the allele pair for one trait separates independently from the allele pair for the other. When these gametes fuse, alleles may recombine into combinations not seen in either parent, such as round-green or wrinkled-yellow. Thus A is correct; genes are not destroyed, parents do contribute genes, and food alone does not determine inherited traits.
Frequently asked questions
What is the correct answer to this question?
Forms of two traits can assort independently and recombine
Why is this the correct answer?
The governing concept is independent assortment during gamete formation. In a dihybrid cross, each parent can produce different gamete types because the allele pair for one trait separates independently from the allele pair for the other. When these gametes fuse, alleles may recombine into combinations not seen in either parent, such as round-green or wrinkled-yellow. Thus A is correct; genes are not destroyed, parents do contribute genes, and food alone does not determine inherited traits.
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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