Meiosis

Diploid critters make haploid gametes

Otherwise offspring would have twice as much DNA as parents

Meiosis is like doing mitosis twice but only replicating DNA once

1^ST Meiotic division

Interphase I

Prophase I

Metaphase I

Anaphase I

Telophase I

2^ND Meiotic division

Interphase II

Prophase II

Metaphase II

Anaphase II

Telophase II

Human gametogenesis

Sexual reproduction results in tremendous genetic diversity

Chromosomes shuffle

Genetic recombination = crossover