BIOL 202 Lecture Notes - Lecture 10: Twin, Heritability, Fallacy
9 Feb 2018
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Fraternal and identical twins: fraternal: dizygotic, come from fertilization of two eggs. Identical: monozygotic, from the fertilization of one egg which split apart into two zygotes. The analysis of the propensity of certain types of data to vary together but without causal effect: ex: there is usually a strong correlation between foot length and height, but. Height does not necessarily cause long feet. You can compare correlation between twin types by doing: Identical twins tend to be treated similarly, as if they are the same person, and this tends to make them more similar. It is not necessarily the result of genes. If identical twins are separated at birth and end up with a similar socioeconomic status, this also increases the estimate of variability. Pretty much, you"re giving genes too much credit for influencing. Broad-sense heritability can lead to scientific error: behaviours: fallacy of using heritability as cash to explain variability between human groups.
