BSC 1005 Lecture Notes - Lecture 12: Asexual Reproduction, Germ Cell, Sister Chromatids
Document Summary
Chapter 12 - meiosis and sexual reproduction. Asexual reproduction produces genetically identical copies of parent. Sexual reproduction involves the formation of sex cells (gametes), fertilization (fusion of gametes) and formation of zygote. Somatic cells do not play a direct role in reproduction. Skin , blood, liver, muscle cells etc. Germ cells are set aside for the function of reproduction. Cells of ovary in female produce eggs, testes in males produce sperms. These are the gametes or sex cells that play a direct role in reproduction. The two chromosomes that make up a matched pair in a diploid cell of an organism. One chromosomes of this pair is inherited from the father, the other from the mother. 22 autosomes and 23 sexchromosomes & karyotype. Homologous chromosomes are of the same length, centromere position, and possess the same genes or alternative form of a gene. Diploid: cells with 2 sets of chromosomes. Haploid: cells with 1 set of chromosomes.
