Genetics: traits, genes, & heredity
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13 terms
Terms | Definitions |
|---|---|
 allele | one of two or more forms that a gene could take |
| DNA | molecule found in the cell nucleus that encodes genetic information |
| dominant allele | an allele that is always expressed when present |
| gene | a segment of DNA that determines or helps to determine a trait |
| genotype | the genetic makeup of an organism; the alleles possessed by an organism are represented by symbols (ex: ff) |
| heterozygous | having 2 alleles that are different |
| homozygous | having 2 alleles that are the same |
| hybrid | the offspring of genetically different parents |
| inheritance | passage of genetic material from parents to offspring |
| phenotype | physical appearance of an organism |
| Punnet Square | diagram that shows the possible offspring of two parents (allows you to determine the probability of each offspring genotype) |
| recessive allele | allele that is not expressed when the dominant allele is present |
| trait | a characteristic of an organism |
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