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9 Cards in this Set
- Front
- Back
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Gene
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a unit of inheritance that usually is directly responsible for one trait or character.
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Allele
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an alternate form of a gene. Usually there are two alleles for every gene, sometimes as many a three or four
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Homozygous
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when the two alleles are the same.
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Heterozygous
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when the two alleles are different, in such cases the dominant allele is expressed.
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Dominant
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a term applied to the trait (allele) that is expressed irregardless of the second allele.
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Recessive
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a term applied to a trait that is only expressed when the second allele is the same (e.g. short plants are homozygous for the recessive allele).
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Phenotype
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the physical expression of the allelic composition for the trait under study.
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Genotype
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the allelic composition of an organism.
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Punnett squares
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probability diagram illustrating the possible offspring of a mating.
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