DEP 5057 Lecture Notes - Lecture 2: Twin Study, Chromosome Abnormality, Down Syndrome
16 May 2016
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Document Summary
Each egg and each sperm contain 23 chromosomes. Klinefelter syndrome (xxy): males who have an extra x chromosome; the presence of the extra x chromosome creates more of a feminine biology- smaller male; late puberty; may not be able to reproduce. Xyy syndrome: more masculinized male; larger; slightly deeper voice; issues in delays in language and social development; lots of undiagnosed males. Fragile x syndrome: damage to one of the x chromosomes; more damaging for a male; can cause cognitive impairment; also delays in motor skills; y chromosome cant make up fully for the x chromosome. Turner syndrome (monosomy): only one chromosome- single x; show signs of being female; physically underdeveloped; not much of sexual organs; reduced cognitive functions. Nature vs. nurture vs. nature & nurture . There is a genetic and environmental component of every trait. A trait is an enduring property- height; personality traits; being a naturally energetic person; introvert.
