Question

which statement describes why offspring produced by sexual reproduction are genetically different from their parents? a. offspring inherit chromosomes randomly from only one parent, so they are different from the other parent. b. offspring receive most of their genetic variation as a result of mutations that occur during meiosis. c. offspring are formed by a combination of gametes from two parents, with variations in the chromosomes of each gamete. d. offspring receive chromosomes from two parents, so they have more chromosomes than either parent.

Explanation:

• Option A: Offspring inherit chromosomes from both parents, not just one. So this option is incorrect.
• Option B: Mutations during meiosis are not the main reason for the genetic difference between offspring and parents. Genetic variation in sexual reproduction mainly comes from the combination of gametes.
• Option C: Sexual reproduction involves the combination of gametes (sperm and egg) from two parents. Each gamete has a unique set of chromosomes (due to processes like crossing - over and independent assortment during meiosis). When they combine, the offspring get a new combination of genes, making them genetically different from their parents.
• Option D: Offspring do not have more chromosomes than their parents. In sexual reproduction, the number of chromosomes is maintained (e.g., in humans, parents have 46 chromosomes, and offspring also have 46 chromosomes, 23 from each parent).

Answer:

C. Offspring are formed by a combination of gametes from two parents, with variations in the chromosomes of each gamete.