Psychology 2040A/B Lecture Notes - Lecture 3: Twin, Twin Study, Egg Cell
5 Jan 2019
School
Department
Course
Professor
Document Summary
Mitosis cell divides into 2 genetically identical cells. Meiosis produces sperm/ova accounts for genetic uniqueness. 1 in 250 births around the world: dizygotic (fraternal) twins. Two ova are fertilized by di erent sperm. Share same amount of genes as other siblings. 1 in 125 births around the world. Identical twins vs. fraternal twins reared together. Identical twins reared apart: adoption studies. Children more like adoptive parents (environmental in uence) or biological parents (genetic in uence) Measure the extent to which individual di erences in traits in a pop. are due to. Do not provide indicators of how much a trait was caused by genes and how much was caused by the environment. Calculation does not require a good understanding of how development occurs and the values do not imply much about how development occurs. Range of reaction: any particular genotype sets limits on the range of possible phenotypes a person might display in a certain environment.
