BISC 102 Lecture Notes - Lecture 6: Mendelian Inheritance, Zygote, Meiosis
30 Jan 2018
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Document Summary
Parent passes on 100% of its genes to the offspring. Occurs through fertilization to produce a genetically novel individual. Each parent passes ~50% of its genes to offspring. Variation in sexual function = separate sexes. Some organisms are hermaphrodites who starts as on sex and turn into the other. Diploid 92n) cells have homologous pairs of chromosomes. The chromosomes that look alike are autosomes and the chromosomes that do not look alike are sex chromosomes. Somatic cells = all cells in the body except sex cells, diploid (2n) and are produced from diploid cell by mitosis. Gametes (sex cells) = eggs and sperms, haploid (n) and are produced from diploid cell by meiosis. Start with a diploid cell 92n) : 2 copies of blue (dad) and red (mom chromosomes) The two chromosomes come together to form homologous chromosomes. Meiosis i = first division of meiosis separates homologous pairs. Meiosis ii = the duplicated chromosomes come apart.
