PSY 2105 Lecture Notes - Lecture 3: Human Genome Project, Francis Crick, Allosome

• School: University of Ottawa
• Department: Psychology
• Course: PSY 2105
• Professor: Stuart Hammond

Document Summary

3. 1 identify and describe the mechanisms and processes by which physical and behavioural characteristics are inherited. Cell division: cells have 3 major subdivisions: the nucleus, the cytoplasm which surrounds the nucleus, and the cell membrane which encases the cell, chromosomes: chemical strands in the cell nucleus that contain the genes. Sex chromosomes: the pair of human chromosomes that determines one"s sex. Second phase: these joined strands line up at cell"s midline. Third phase: each x splits into two identical chromosomal strands and move to opposite sides of the cell, where a nucleus forms around each set of chromosomes and the cell divides itself into two. First phase: the 46 chromosomes of the cell similarly duplicate into two identical strands that remain attached like an x. Second phase: the x shaped chromosomes pair up with a partner and exchange pieces in a process called crossing over.