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16 Cards in this Set
- Front
- Back
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An animal that has both recessive alleles |
Homozygous Recessive |
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An animal that has both dominant alleles |
Homozygous Dominant |
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An animal that has a recessive allele and a dominant allele |
Heterozygous |
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If two different traits are both equally expressed in an organism |
Co-dominant |
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If two different traits sort of blend, so that neither is fully present in the phenotype |
Incompletely Dominant |
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An organism that expresses a recessive phenotype |
Homozygous Recessive |
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When one gene affects the expression of another gene |
Epistasis |
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The combination of genes in an organism |
Genotype |
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The term for a version of the gene |
Allele |
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The physical appearance of an organism that is the result of its genes |
Phenotype |
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If all of the offspring of a couple are the recessive phenotype, the parents must have this genotype combination. |
aa x aa |
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If 3/4's of the offspring have the dominant phenotype and 1/4 have the recessive phenotype, the parent combination is most likely to be this. |
Aa x Aa |
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If the offspring are half dominant, half recessive phenotypes, the parent combination is most likely to be this. |
Aa x aa |
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If all of the offspring are homozygous dominant, the parent combination must be this. |
AA x AA |
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In Holstein cows, black is dominant and red is recessive. A bull and cow (both heterozygous for color) have 3 calves. All of them are black. What are the odds that their fourth calf will be red? |
25% |
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The color Roan is an example of this. |
Co-Dominance |
