Question

1. explain the purpose and outcome of meiosis. 2. what is a gamete, and why is it described as haploid (n) instead of diploid (2n)? 3. what are homologous chromosomes, and how do they contribute to genetic inheritance? 4. how does meiosis contribute to genetic diversity within a species?

Explanation:

1. Meiosis is for sexual - reproduction. It produces four haploid cells from one diploid cell, reducing chromosome number by half.
2. A gamete is a sex cell (sperm or egg). It is haploid because when two gametes fuse during fertilization, the resulting zygote will have the correct diploid number of chromosomes for the species.
3. Homologous chromosomes are pairs of chromosomes with the same genes at the same loci, one from each parent. They can exchange genetic material through crossing - over during meiosis, contributing to genetic variation in offspring.
4. Meiosis contributes to genetic diversity through crossing - over (exchange of genetic material between homologous chromosomes) and independent assortment (random alignment of chromosome pairs during meiosis I), creating unique combinations of alleles in gametes.

Answer:

1. Purpose: To produce gametes for sexual reproduction. Outcome: Four haploid cells are formed from one diploid cell, halving the chromosome number.
2. A gamete is a sex cell. It is haploid because when two gametes combine during fertilization, the offspring will have the correct diploid chromosome number.
3. Homologous chromosomes are pairs of chromosomes with the same genes, one from each parent. They contribute to genetic inheritance by exchanging genetic material through crossing - over during meiosis.
4. Meiosis contributes to genetic diversity through crossing - over between homologous chromosomes and independent assortment of chromosome pairs during meiosis I.