Haploid gametes are produced during meiosis in the setting of cell division. Which unique event results in genetic diversity in progeny during meiosis I but not during meiosis II? Separation of sister chromatids Crossing over (recombination) Replication of DNA Reduction in chromosome number

The unique event that results in genetic diversity in progeny during meiosis I but not during meiosis II is Crossing over (recombination).

Here's a step-by-step explanation:

1. Meiosis is a type of cell division that reduces the number of chromosomes in a parent cell by half to produce four gamete cells. This process occurs in two phases: meiosis I and meiosis

The unique event that results in genetic diversity in progeny during meiosis I but not during meiosis II is Crossing over (recombination).

Here's a step-by-step explanation:

1. Meiosis is a type of cell division that reduces the number of chromosomes in a parent cell by half to produce four gamete cells. This process occurs in two phases: meiosis I and meiosis II.

2. During meiosis I, homologous chromosomes pair up and exchange segments in a process called crossing over or recombination. This is the unique event that leads to genetic diversity. Each chromosome pairs with its corresponding homologous chromosome to form a tetrad. This tetrad contains four chromatids. During this pairing, bits and pieces of the chromatids may be exchanged in a process called crossing over.

3. Crossing over results in a reshuffling of genetic material. It's like shuffling a deck of cards. The chromosomes that result have a mix of genes from the individual's mother and father. This is why siblings (except for identical twins) are genetically different from each other.

4. In meiosis II, the sister chromatids within the two daughter cells separate, creating four new haploid gametes. These gametes are not identical because of the crossing over that occurred in meiosis I.

5. Therefore, the unique event that results in genetic diversity in progeny during meiosis I but not during meiosis II is crossing over (recombination).