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21 Cards in this Set
- Front
- Back
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Gregor Mendel |
Work on pea plants. Genes come in pairs-inherited as distinct units. Tracked parent genes as Dom. Or rec. in offspring. |
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Heterozygous |
A pair of genes- one dominant one recessive |
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Homozygous |
Pair of matching alleles. nn |
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Dominant allele |
Expresses its phenotypic effect even when heterozygous with recessive allele |
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Recessive allele |
Produces characteristic only when it's paired allele is identical |
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Genotype |
The genetic constitution of an individual organism |
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Phenotype |
The set of observable characteristics of an individual |
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Cystic fibrosis |
Autosomal recessive disorder. Produces extra thick mucus. Chloride ions fail to pass through plasma membrane |
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Chances two carries of cystic fibrosis will produce offspring with it |
25% |
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Huntington's disease. |
Dominant neurological disorder. Leads to progress or degeneration of neurons in brain |
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Autosome |
Any chromosome that is not a sex chromosome |
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Sex chromosome |
Participating in sex determination |
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Does male or female determine gender? (Humans) |
It depends on whether the sperm fertilizing the egg is carrying another x or y |
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Female |
XX |
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Male |
XY |
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Polygenic inheritance |
The determination of a particular characteristic (height, skin color) |
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What are sex linked traits? |
Traits linked to connection on X or Y |
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Multiple alleles |
Series of three or more alternative or alleluia forms of a gene |
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Codominance |
Relationship between two versions of a gene. |
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Himalayan rabbits |
Darker colors due to lower body temperature in those areas |
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Pleiotropy |
One gene influences two or more seemingly unrelated phenotypic types. |
