BISC105 Lecture Notes - Lecture 2: Karyotype, Cytoplasm, Telophase
14 Mar 2016
School
Department
Course
Professor
Document Summary
Homework is assigned on thursdays and due on tuesdays. Turning in all of your homework can bump up a letter grade at end of semester if you"re on the border of letters. Homework questions will be on the last slide of lecture on sakai. Chromosomes are not visible in non-dividing cells. Sex cells (gametes) have 23 chromosomes (n or haploid number) Somatic cells have 23 pairs (46 chromosomes) (2n or diploid number) Sperm (23, n) + egg (23, n) = zygote (46, 2n) Each gamete has 22 autosomes (non-sex chromosomes) and 1 sex chromosome: sex chromosome varies, males produce x or y sex chromosomes in sperm, females produce x chromosomes in eggs. Each body cell has 44 autosomes and 2 sex chromosomes: autosomes are the same in males and females. Replication must occur prior to cell division: cell division is called mitosis in body cells. Each chromosome is a single rod (23 pairs) before.
