Psychology 2040A/B Lecture Notes - Lecture 3: Allosome, Y Chromosome, Prenatal Development
6 Mar 2020
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Document Summary
The mysterious tree of a newborn"s life: this is an imprint of an actual placenta, a big organ for expecting moms to grow in the first trimester. It is like growing a new lung, it takes a lot of energy and is one of the many reasons many women experience fatigue in the first trimester. Biological foundations: phenotype: directly observable characteristics, which depend, in part of genotype (ex. Dna: gene: a segment of dna along the length of a chromosome, mitosis: when dna duplicates itself, allows a single cell formed at conception to develop into a baby, each chromosome copies itself for the new cells. Sex chromosomes: in females xx, in males xy: sperm carry either an x or y chromosome, not both. Twins: monozygotic twins: arises from one egg and one sperm, twins are identical, sharing same genetic makeup, have the same frequency across race, age, culture.
