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9 Cards in this Set
- Front
- Back
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chromosomes
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-strands of hereditary material
-inside the nucleus -each human nucleus contains 23 pairs |
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genes
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sections along each chromosome that control the chemical reactions that direct development
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sex chromosomes
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- determine whether an individual develops as a male or female
- male: xy, female: xx |
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sex-linked genes
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- aka x linked
- genes located on the x chromosome - x linked recessive show its effects more in men than women |
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heritability
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-an estimate of the variance within a population that is due to heredity
- on a scale from 0 to 1 with 1 being heredity controlling all the variance |
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monozygotic twins
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- twins that develop from a single fertilized egg and therefore have identical genes
- also called identical twins |
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dizygotic twins
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- develop from two eggs and share only half their genes, like brother and sister
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evolution
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- a gradual change in the frequency of various genes from one generation to the next
- allows traits that are beneficial to become more prevalent in populations |
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natural selection
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- the process through which evolution occurs where the individuals with genes that allow for better fecundity survive longer and therefore pass on their genes to their offspring
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