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16 Cards in this Set
- Front
- Back
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trait
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a physical characteristic of a living thing that can be passed on to its offspring
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heredity
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the passing of traits from parents to offspring
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genetics
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the scientific study of heredity
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purebred
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an organism that always produces offspring with the same trait as the parent
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gene
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a segment of DNA that codes for a specific trait
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allele
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the different forms of a gene
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dominant allele
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an allele whose trait always shows up in the organism when the allele is present
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recessive allele
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an allele that is "covered up" or masked when a dominant allele is present
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hybrid
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an organism that has two different alleles for a trait
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probability
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the likelihood that a particular event will happen
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Punnett square
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a chart that shows all the possible combinations of alleles that can result from a genetic cross
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phenotype
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an organism's physical appearance, or visible trait
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genotype
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an organism's genetic make up, or allele combination
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homozygous
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having the same, two identical alleles for a trait. PUREBRED Example: TT or tt
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heterozygous
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having two different alleles for a trait. HYBRID Example: Tt or Ss
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codominance
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a condition in which neither of two alleles of a gene is dominant or recessive. offspring doesn't look like either parent
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