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Lessons 5.4
| Term | Definition |
|---|---|
| Heredity | the passing of genetic material from parent to offspring |
| Gene | one set of instructions for an inherited trait |
| Allele | one of the alternative forms of a gene that governs a characteristic, such as hair color |
| Genotype | the entire genetic makeup of an organism; also the combination of genes for one for one or more specific traits |
| Phenotype | an organism's appearance or other detectable characteristic |
| Domiant | in genetics, describes an allele that is fully expressed whenever the allele is present in an individual |
| Recessive | describes an allele that will be masked unless the organism in homozygous for the trait |
| Incomplete dominance | a condition in which two alleles are expressed such that the phenotype of a heterozygous individual is an intermediate of the phenotypes of the two homozygous parents |
| Codominance | a condition in which two alleles are expressed such that the phenotype of a heterozygous individual is a combination of the phenotypes of the two homozygous parents |
| Punnett square | a graphic used to predict the results of a genetic cross |
| Probability | the likelihood that a possible future event will occur in any given instance of the event |
| Ratio | a comparison of two numbers using division |
| Pedigree | a diagram that shows the occurance of a genetic trait in several generations of a family |
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jg.18589
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