CRIM 101 Lecture Notes - Lecture 5: Bad Hindelang, Twin Study, Sigmund Freud
9 Apr 2016
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Studying human geneics can be diicult from etheical, numerical, biological perspecive. Good scieniic studies require large # of idenical research subjects. Cannot (ethically or legally) lone idenical humans for use as research subjects. Even large scale studies (e. g. , drug trials) are inluenced b bio factors and environmental factors (ex diet, lifestyle) Clones do exist in form of twins. Dizygoic (dz) twins result from 2 sperm ferilizing 2 eggs ( no more similar than pair of full siblings ) Monozygoic (mz) twins result from single sperm ferilizing 1 egg, which splits apart and becomes 2 separate zygotes ( 2 generically idenical babies ) Result from single sperm ferilizing single egg (2 geneically idenical babies) Results from 2 sperm ferilizing 2 eggs. Sharre 100% of 1% of dna that explains variaion of characterisics. Share 50%of 1% of dna that explains variaion of characterisics. The search for concordance (purpose of twin studies)
