Psychology 2040A/B Lecture Notes - Lecture 2: Chemical Substance, Chromosome, Mitosis

• School: Western University
• Department: Psychology
• Course: Psychology 2040A/B
• Professor: hessels

Document Summary

Monday, october 2, 2017 developmental psych textbook notes chapter 2 genetic and environmental foundations. Phenotypes directly observable characteristics: a ected by each person"s lifelong history of experiences. Genotype the complex blend of genetic info that determines our speci es and in uences all our unique characteristics. Chromosomes rod-like structures, store and transmit genetic info. Human chromosomes come in 23 matching pairs: each pair corresponds to the other in size, shape and genetic functions. Send instructions for making rich assortment of proteins to the cytoplasm (area surrounding the nucleus: regulator genes modify instructions given by protein coding genes. 23rd pair is sex chromosomes, females: xx and males: xy. Multiple o spring: fraternal / dizygotic twins most common type of multiple o spring, resulting from the release and fertilization of two ova. Genetically they are no more alike than siblings. About 1 every 33 births in the states.