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Science
Chapter 5
| Term | Definition |
|---|---|
| allele | the different form of a trait that a gene may have |
| phenotype | the way an organism looks or behaves |
| genotype | an organism's genetic makeup |
| heredity | passing of traits from parents to offspring |
| dominant | a trait that can cover up another form of the trait |
| Punnett square | a tool used to predict the probability of traits |
| recessive | describes a trait that is covered over or hidden |
| genetics | study of how traits are inherited through the action of alleles |
| polygenic inheritance | occurs when a group of gene pairs acts together to produce a trait, such as human eye color |
| heterozygous | describes an organism with different alleles for a trait (example: Tt); also called a hybrid |
| homozygous | describes an organism with two alleles that are the same for a trait |
| hybrid | an offspring that was given different genetic information for a trait from each parent |
| incomplete dominance | production of a phenotype that is intermediate or a blend of two homozygous parents |
| genetic engineering | biological and chemical methods to change the arrangement of a gene's DNA |
| sex-linked gene | an allele inherited on a sex chromosome that can cause a disorder, such as color blindness |