PS102 Lecture Notes - Lecture 2: Dementia, Immune System, Deductive Reasoning
Document Summary
Designed to look at how both individuals from different age groups compare to open another and also follow them over time. Genes: basic building blocks of our biological inheritance. Deoxyribonucleic acid (dna): molecules in which genetic information s coded. Chromosomes: strands of dna, each human as 46, 23 pairs. Dominant trait: a trait that is expressed in the phenotype regardless of whether the genotype is homozygous or heterozygous. Recessive trait: a trait that is expressed in the phenotype only if the genotype is homozygous. Codominance: a phenotype expressing both traits that are coded by a heterozygous genotype. Only a few of our traits are discrete the product of a single gene pair. Most are polygenic traits involve the combined impact of multiple genes most behaviors are phylogenetically determined. Germinal period- ovulation to implantation (0-2 weeks) Egg leaves ovary, fertilized in fallopian tube (zygote) makes its way to uterus for growth.
