BIOL 1001 Lecture : BioCh9 Notes
Document Summary
Chapter 9: the continuity of life: cellular reproduction. One around each set of unduplicated chromosomes: results of mitosis, two daughter nuclei, each with the same chromosome number as parent cell, chromosomes in unduplicated form. Requires synchronized reproductive behavior copulation sperm are released into female through the penis: internal fertilization: sperm enter the body of the female. Involves: meiosis separates homologous chromosomes, producing haploid daughter. Meiosis i: homologous chromosomes pair and then separate from each other. Meiosis ii: the two sister chromatids of each duplicated chromosome are separated from each other. Prophase i: each duplicated chromosome pairs with its homologue, homologues swap segments, called crossing over , crossing over is a mutual exchange of corresponding chromatid sections between maternal and paternal homologues, each chromosome becomes attached to spindle. Anaphase i: one duplicated chromosome of each homologous pair moves to each pole, pulled by microtubules, the sister chromatids remain attached.
