1.1 meiosis and mitosis

What is the purpose of mitosis in gametogenesis?

expand primordial germ cell population

What is the purpose of meiosis in gametogenesis?

reduce diploid germ cell into haploid gamete for sexual reproduction

What are the steps of mitosis?

1. interphase

2. prophase

3. metaphase

4. anaphase

5. telophase/cytokinesis

What occurs in interphase of mitosis?

1. G1: normal cell growth, function

2. S: DNA replicates

G2: cell prepares for division

What occurs in prophase of mitosis?

chromatins condense into chromosome, nuclear envelope dissolves

What occurs in metaphase of mitosis?

chromosomes align on metaphase plate

What occurs in anaphase of mitosis?

sister chromatids separate

What are the steps of meiosis?

Prophase 1, Metaphase 1, Anaphase 1, Telophase 1, Prophase 2, Metaphase 2, Anaphase 2, Telophase 2

What occurs in interphase of meiosis?

chromosome duplicate

What occurs in prophase 1 of meisosis?

tetrad forms and crossing over occurs

What occurs in metaphase 1 of meiosis?

tetrads line along metaphase plate in random assortment

What occurs in anaphase 1 of meiosis?

homologous chromosomes separate, haploid

What occurs in anaphase 2 of meiosis?

sister chromatids separate, haploid

What is the product of meiosis?

4 haploid cells with unique chromosomes