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Science Chapter 3
Interactive Science Book 2
| Term | Definition |
|---|---|
| Heredity | The passing of physical characteristics from parents to offspring. |
| Trait | What it looks or acts like. |
| Genetics | The study of heredity. |
| Fertilization | When a new organism begins to form when egg and sperm cells join in the process. |
| Purebred | When an animal has the same trait from generations ago. |
| Gene | Factors that control traits. |
| Allele | Are the different forms of a gene. |
| Dominant Allele | One whose trait always shows up in the organism when the allele is present. |
| Recessive Allele | Is hidden when ever the dominant allele is present. |
| Hybrid | An organism that has to different allele for a trait. |
| Probibilaty | A number on how likely something is to occur. |
| Punnet square | A chart that shows all the possible ways allele can combine in a genetic cross. |
| Phenotype | Physical traits. |
| Genotype | Its genetic makeup or allele. |
| Homozygous | An organism that has two identical allele for a trait. |
| Heterozygous | An organism that has two different allele for a trait. |
| Incomplete Dominance | Occurs when one allele is only partial dominant. |
| Codominance | Occurs when both alleles for a gene are expressed equally. |
| Multiple Alleles | When three or more alleles determine the trait. |
| Polygenic Inheritance | Occurs when more than one allele affects the trait. |
| Meiosis | The process in which the number of chromosomes is reduced by half as sex cell forms. |