GCD lecture 3

• karyotype: the number of chromosomes in a cell, and the arrangement of the chromosomes
• Meiosis - Metaphase 1: pairs of sister chromatids are aligned in a double row along the metaphase plate
• meiosis - anaphase 1: the two pairs of sister chromatids separate from each other.
• spermatogenesis: cells go from 1, 4n cell -> 2, 2n cells (meiosis 1)-> 4, 1n cells (meiosis 2)