V - configurations. the more closely related we are the...

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V. Genetics (this is going to be covered very, very, briefly) the study of heredity (characteristics transmitted by the genes a person is born with). 1) Gene - DNA segments that serve as the key functional units in hereditary transmission. a) genotype - all of the genes you are born with (the combination of these genes and environmental influences form a person's observable characteristics). b) phenotype - the expression of your genetic makeup (eye color, height, hair color, etc). 2) Chromosomes - thread-like strands of DNA molecules that form the DNA segments. every cell in the human body has 46 chromosomes; 23 from mom, 23 from dad. each parent's chromosomes can be scrambled 8 million ways to give approx. 70 trillion possible
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Unformatted text preview: configurations. the more closely related we are the more genes we have in common, the more similar we are to one another. a. autosomes- all chromosomes except sex chromosomes, which regulate such things as eye color, hair, body size, etc. 1. dominant genes- genes that are expressed when paired genes are mixed 2. recessive genes- genes that are masked when paired genes are mixed. 3. homozygous genes- the combination of two similar genes in a pair (bb, BB, etc) 4. heterozygous genes- the combination of two dissimilar genes in a pair (Bb, etc) b. sex chromosomes- one pair of the 23 chromosomes from each parent which determines your gender....
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This note was uploaded on 12/04/2011 for the course PSY 2012 taught by Professor Scheff during the Fall '08 term at Broward College.

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