LIFESCI 7B Lecture Notes - Lecture 2: Myiasis, Sexual Reproduction, Mendelian Inheritance
Document Summary
Fertilization diploid stage returned until reduction and gametes are made again. Dna must be replicated in order for cells to undergo meiosis. Replicate the two chromosomes to four for one per gamete (4) In order to have four haploid gametes we would need to replicate the two. Meiosis one round of division two rounds of division. Chromosomes line up di erently on the metaphase plate. 92 23 homologous pairs, 46 homologous chromosomes, 92 sister chromatids, 96 total chromosomes after replication in meiosis. One parent will undergo reduction division and produce halpoid gametes one set comes from maternal and the other comes from paternal contribute. H l han centromere homologous chromosomes separated crossing over so its not mitosis di erent color tips -- cross over has occurred. Purpose of meiosis? make haploid cells -- 1 chromosome per. After meiosis ii, there are 0 pairs of homologous chromosomes in a single cell.
