PSYCH 11 Chapter Notes - Chapter 2: Y Chromosome, Egg Cell, Twin
15 Jan 2017
School
Department
Course
Professor
Document Summary
Genotype: blend of genetic info that determines our species and influences all of our unique characteristics. Chromosomes: made up of a chemical substance, dna. Genes: segment of dna along the length of the chromosome. Protein coding genes: directly affect our body"s characteristics (check pg for more detail) Regulator genes: 18,000; modify the instructions by protein-coding genes. Gametes: sex cells; the sperm and ovum. Meiosis: halves the # of chromosomes present in body cells. Adaptive; increases the chances that the species will cope/survive in changing environs. Zygote: the resulting cell after sperm and ovum unite (at conception) Autosomes: not sex chromosomes; 22 of 23 pairs of chromosomes are matching pairs. X is a large chromosome; y carries little genetic material. Sex of new organism determined by the sperm. Dizygotic twins: fraternal; result from the release and fertilization of 2 ova. Genetic-wise = no more alike than regular siblings.
