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Top 2.1-2.2
Topic 2: Genes and Heredity
| Term | Definition |
|---|---|
| heredity | the passing of traits from parents to offspring |
| dominant allele | an allele whose trait always shows up in the organism when the allele is present |
| recessive allele | an allele that is hidden whenever the dominant allele is present |
| probability | a number that describes how likely it is that a particular event will occur |
| genotype | an organism's genetic makeup, or allele combinations |
| phenotype | an organism's physical appearance, or visible traits |
| homozygous | two identical alleles; purebred, two capital letters or two lowercase letters |
| heterozygous | represents two different alleles; hybrid, a capital and lowercase |
| chromosome | a threadlike structure within a cell's nucleus that contains DNA that is passed from one generation to the next |
| pedigree | a tool that geneticists use to map out the inheritance of traits |
| meiosis | the process that occurs in the formation of sex cells (sperm and egg) by which the number of chromosomes is reduced by half |
| mitosis | the second stage of the cell cycle, during which the cell's nucleus divides into two new nuclei and one set of DNA is distributed into each daughter cell |
Created by:
muellershauna
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