8 - Phys. Self - Genetics and Environment

8 - Phys. Self - Genetics and Environment - DFST 1013...

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DFST 1013 Lindsey Fields, M.S.
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Darwin’s Theory of  Evolution There is genetic variation in a species Some genes aid adaptation more than others do Natural selection Genes that aid their bearers in adapting to their environment will be passed to future generations more frequently than genes that do not
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Genetic code Zygote – the size of a pinhead Contains 46 chromosomes Each person has around 30,000 genes Each gene is a stretch of deoxyribonucleic acid (DNA) Human Genome Project Government-sponsored effort to decipher the human genetic code
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Genetic code Any couple can theoretically have 64 trillion babies without producing 2 children with identical genes. Identical individuals occur in 1 in 250 births Fraternal individuals occur in 1 in 125 births
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Genetic code Genotype The genetic makeup a person inherits Phenotype The characteristic or trait the person eventually has Dominant gene Will be expressed when paired with a recessive gene Recessive gene A weaker gene that can be dominated
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This note was uploaded on 04/14/2008 for the course DFST 1013 taught by Professor Fields-moore during the Spring '08 term at North Texas.

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8 - Phys. Self - Genetics and Environment - DFST 1013...

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