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Chapter 3 lesson 1/2
| Term | Definition |
|---|---|
| Heredity | The passing of traits from parents to offspring. |
| trait | A specific characteristic that an organism can pass to it's offspring through its genes. |
| genetics | The scientific study of heredity. |
| fertilization | The process in sexual reproduction in which an egg cell and a sperm cell join to form a new cell. |
| purebred | An spring of many generations that has the same form of a trait. |
| gene | A sequence of DNA that determines a trait and is passed from parent to offspring. |
| allele | The different forms of a gene. |
| dominant allele | An allele whose traits always shows up in the organism when the allele is present. |
| recessive allele | An allele that is hidden whenever the dominant allele is present. |
| hybrid | An offspring of crosses that has two different alleles for a trait. |
| probability | A number that describes how likely it is that a particular event will occur. |
| Punnett square | A chart that shows all the possible combinations of alleles that can result from a genetic cross. |
| phenotype | An organism's physical appearance, or visible traits. |
| genotype | An organism's genetic makeup, or allele combinations. |
| homozygous | Having two identical alleles for a particular gene. |
| heterozygous | Having two different alleles for a particular gene. |
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