BIOL 1081 Lecture Notes - Lecture 23: Mendelian Inheritance, Genetic Linkage, Sister Chromatids
Document Summary
Meiosis & genetic variation reading: sections 13. 3-13. 4 in textbook: draw a labeled figure of the sequence of different phases of meiosis, indicating what occurs during each phase, compare and contrast meiosis i and meiosis ii. The number of chromosomes is reduced to half (from diploid to haploid state) Crossing over occurs which makes the two chromatids of a chromosome different. An interphase having both growth phases and synthetic phase precedes meiosis i. In prophase i, sister chromatids have convergent arms. The two chromatids of a replicated chromosome separate. The number of chromosomes remains the same (from haploid to haploid state) The generally different chromatids of a chromosome are separated. The interphase or interkinesis has only growth phase. In prophase ii, the sister chromatids have divergent arms. A process of asexual reproduction in which the cell divides in 2 producing a replica, with an equal number of chromosomes in each resulting diploid cell.
