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Shinlever Heredity
Terms from the Heredity Unit
| Term | Definition |
|---|---|
| dominant | Mendel’s name for an inherited trait that appeared in the heterozygous individual. |
| recessive | Mendel’s name for an inherited trait that is hidden or masked by the dominant trait in the heterozygous individual. |
| genotype | An organism’s genetic make up composed of a pair of alleles. |
| phenotype | Observed characteristic or expressed trait that results from an allele pair. |
| allele | Version of a gene for a single gene trait. |
| inheritance | Passing of genetic information (traits) from parent to offspring. |
| purebred | Only possessing one version of a gene for a particular trait (homozygous). |
| hybrid | Containing two contrasting alleles for a genetic trait (heterozygous). |
| dihybrid cross | A genetic cross looking at two traits where each parent is hybrid for each trait. |
| homozygous | Purebred, containing only one version of a gene. |
| heterozygous | Hybrid, containing one dominant and one recessive allele for a trait. |
| pedigree | Diagram of a family history used to study inheritance patterns of a trait through several generations that can be used to predict disorders in future offspring. |
| codominant | Complex inheritance pattern that occurs when neither allele is dominant and both alleles are expressed. |
| incomplete dominance | Complex inheritance pattern in which the heterozygous phenotype is intermediate between those of the homozygous parent organisms.(a blending of phenotypes) |
| multiple alleles | Having more than two alleles for a particular trait. |
| polygenic | Characteristic such as eye color or skin color , that results from the interaction of multiple gene pairs. |
| autosomal | A disease resulting from a mutation on an autosome chromosome; not sex-linked. |
| sex-linked | A disease that disproportionately affects one sex usually resulting from a mutation on the X chromosome. |