PSY 321 Chapter Notes - Chapter 2: Twin, Twin Study, Amniocentesis
Document Summary
What can be inherited: temperament, personality, iq, physical traits. How to tell whether something is inherited: twin studies- not always true but mostly true. Monozygotic identical twins (one sperm, one egg, split) closer to 100% Dizygotic fraternal twins (two eggs, two sperms) 50% Range of reaction of gene more similarities (genetically), smaller the range: min or max (height, hormones (vitamins) Phenotype: result of genotype, what we like, our personality, environment plays a role as well. Our environment has an impact on how our genes are activated . 23 pairs of chromosomes: made of genes and dna. 2 copies of each gene alleles: alike- homozygous, different- heterozygous. Amniocentesis (18 weeks) extracting some fluid from around the uterus and baby to test dna. Chorionic villi sampling (8/9weeks)- extract fluid from around the embryonic sack: genetic counseling. Family: rich or poor (poverty versus affluence) Affluence can be caused by lack of parent role in child"s life.
