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Unit 4: Heredity
Term | Definition |
---|---|
Alleles | Different forms of a trait that a gene may have. |
Homozygous | An organism with two alleles that are the same. (purebred) |
Heterozygous | An organism with two different alleles for a trait. (hybrid) |
Phenotype | The physical appearance of an organism. |
Genotype | The genes of an organism. The actual genetic makeup of an organism. |
Dominant | A trait that dominates or covers up the other form of the trait |
Recessive | A trait that is covered up by a dominate trait. |
Punnett Square | A chart that shows all the possible combinations of alleles. |
Heredity | The transfer of genetic information from parent to offspring. |
Trait | A characteristic of an organism, can be genetic or acquired. |
Chromosome | A single, highly organized and structured piece of DNA. |
DNA | A double helix structure containing an individual's genetic code. |
Gene | Small part of a chromosome that determines a specific trait for an organism. |