What are two benefits of meiosis to sexual reproduction?

What are two benefits of meiosis to sexual reproduction?

The same number of chromosomes in each gamete as the parent cell

Genetic variation or genetic diversity in the offspring

Sperm and egg cells are identical to the parent cell

Gametes are genetically different from each other

1 answer

Meiosis is a crucial process in sexual reproduction, and here are two key benefits it provides:

  1. Genetic Variation or Genetic Diversity in Offspring: Meiosis introduces genetic diversity through processes such as crossing over (where homologous chromosomes exchange genetic material) and independent assortment (where chromosomes are randomly distributed into gametes). This genetic variation is essential for evolution and adaptation, as it enables populations to respond to changing environments and enhances survival chances.

  2. Gametes are Genetically Different from Each Other: Unlike mitosis, which produces identical daughter cells, meiosis results in gametes (sperm and egg cells) that are genetically distinct from one another and from the parent cell. This genetic difference ensures that when fertilization occurs, the zygote formed has a unique combination of genes, contributing further to the genetic diversity of the species.

The other statements you provided do not accurately reflect the benefits of meiosis related to sexual reproduction. For example, gametes typically have half the number of chromosomes as the parent cell, which is essential for maintaining chromosome number across generations when fertilization occurs.