BIOL 1020 Lecture Notes - Lecture 22: Cleavage Furrow, Spindle Apparatus, Telophase

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1020
• Professor: Shaw Michael

Document Summary

Lecture-22: homologues appear alike in the microscope, but they may have different versions of a gene called an allele at corresponding loci. Which the pairing up of: basically meiosis reduces the number of chromosome sets from two to one, whereas mitosis conserves the number of chromosomes. Meiosis produces genetically different daughter cells while mitosis produces genetically identical daughter cells. Meiosis undergoes two divisions and mitosis undergoes only one. homologous chromosomes that result in a rearrangement of genetic information between two non-sister chromatids. The x shaped site where crossing over occurs is called a chiasmata. unlike mitosis and therefore they are separated in meiosis i, with their sister chromatids still intact. Homologous chromosomes line up at the metaphase plate in meiosis i: prophase 1 typically occupies more than 90% of the time. Chromosomes begin to condense. in synapsis, homologous chromosomes loosely pair up, aligned gene by gene.