CRIM 101 Lecture Notes - Lecture 5: Albert Bandura, Social Cognitive Theory, Prenatal Nutrition
13 Nov 2017
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Document Summary
Studying human genetics can be difficult from an ethical, numerical and biological perspective. Good scientific studies require a large number of identical research subjects. Cannot (ethically or legally) clone identical human beings for use as research subjects. Even large scale studies (ie. drug trials) are influenced by biological factors and environmental factors (diet, lifestyle) Clones do exist, in the form of twins. Dizygotic (dz) twins result from two sperm fertilizing two eggs ( no more genetically similar than any other pair of siblings ) Share 50% of the 1% of dna that explains variation in characteristics. Monozygotic (mz) twins result from single sperm fertilizing single egg, which then cleaves and becomes two separate zygotes ( two genetically identical babies ) Mz -result from single sperm fertilizing single egg (two genetically identical babies) Mz -share 100% of the 1% of dna that explains variation in characteristics.
