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Ch.3 Life Scienc (B)
Heredity and Genetics
| Question | Answer |
|---|---|
| homozygous | having two like genes for the same trait; |
| heterozygous | having two unlike genes for the same trait; |
| dominant gene | gene whose trait always shows itself; |
| recessive gene | gene of a trait that is hidden when the dominant gene is present; |
| Punnett Square | chart that shows possible gene combinations; |
| gender | sex of a person or other organism; |
| sex-linked traits | traits that are controlled by the sex chromosomes; |
| carrier | an organism that has a recessive gene for a trait but does not show the trait; |
| pedigree | chart that shows inheritance of certain traits over several generations; |
| inherited disease | disease caused by an inherited gene; |
| probability | the chance of an event occurring; |
| genotype | the gene combination for a given trait in an organism; |
| phenotype | the appearance of a trait in an organism; |