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

1ST Meiotic division

                        Interphase I

                        Prophase I

                        Metaphase I

                        Anaphase I

                        Telophase I

 

            2ND 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