PSYCH211 Lecture Notes - Lecture 1: Genomic Imprinting, Turner Syndrome, Coparenting

• School: University of Waterloo
• Department: Psychology
• Course: PSYCH211
• Professor: Kathleen Bloom

Document Summary

Genotypes: genetic information that determines our species & influences all our unique characteristics. Dna: double stranded, nitrogenous bases, a-t, c-g, duplicates itself via mitosis. Gene: segment of dna along the length of the chromosome, 20,000 -25,000 genes lie along human chromosomes, 98-99% of chimpanzee dna is identical to that of humans, all humans are 99. 1% genetically identical. Gametes: sex cells, sperm, ovum, 23 chromosomes, form via meiosis. Zygote: forms when a sperm & ovum combine. Meiosis: ensures that constant quantity of genetic material is transmitted from one generation to the next. Pairs split and form gametes (23 chromosomes) Genetic variability in meiosis is adaptive: generates offspring that vary in phenotype increasing chances of survival for species in changing environments. 1-2 million female sex cells are present at birth 40,000 remain at adolescence . 350-450 will mature during a woman"s child bearing years. Chromosome 23 sex chromosome female: xx male: xy.