PSYCH211 Lecture Notes - Lecture 3: Sickle-Cell Disease, Abo Blood Group System, Hair
Document Summary
Biologi(cid:272)al father"s sper(cid:373) + (cid:271)iologi(cid:272)al (cid:373)other"s o(cid:448)u(cid:373) = z(cid:455)gote. Zygote 46 chromosomes in total (23 from each parent) Mitosis: mitosis begins after fertilization, the process in which a cell duplicates its chromosomes and then divides into two genetically identical daughter cells. Meiosis the process by which a germ cell divides, producing gametes (sperm or ova) that each contain half of the pare(cid:374)t (cid:272)ell"s origi(cid:374)al (cid:272)o(cid:373)ple(cid:373)e(cid:374)t of (cid:272)hro(cid:373)oso(cid:373)es; i(cid:374) hu(cid:373)a(cid:374)s, the produ(cid:272)ts of (cid:373)eiosis contain 23 chromosomes. Crossing-over a process in which genetic material is exchanged between pairs of chromosomes during meiosis. Monozygotic (identical): a zygote that divides to form two genetically identical individuals. Dizygotic (fraternal): occurs when two ova are released simultaneously and both are fertilized by different sperm. 1 in 125 births (higher with fertility drugs because they take medications that make ovaries go into hyperdrive) Gender of child determined by father"s sper(cid:373) Direct production of amino acids necessary for forming new cells blue print of human life.
