BIOL 1020 Chapter Notes - Chapter 15: Thomas Hunt Morgan, Homologous Chromosome, Mendelian Inheritance

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1020
• Professor: Joy Stacey

Document Summary

Concept 15. 1 mendelian inheritance has its physical basis in the behavior of chromosomes: around 1900, cytologists and geneticists began to see parallels between the behavior of chromosomes and the behavior of. Using improved microscopy techniques, cytologists worked out the process of mitosis in 1875 and meiosis in the 1890s. Chromosomes and genes are both present in pairs in diploid. Fertilization restores the paired condition for both chromosomes cells. during meiosis. and genes: around 1902, walter sutton, theodor boveri, and others noted these parallels and a chromosome theory of inheritance began to take form: Morgan worked with drosophila melanogaster, a fruit fly that eats fungi on fruit. Fruit flies are prolific breeders and have a generation time of two weeks. Fruit flies have three pairs of autosomes and a pair of sex chromosomes (xx in females, xy in males): morgan spent a year looking for variant individuals among the flies he was breeding.