Genetics Vocabulary

3. square A chart that shows all the possible combinations of alleles that can result from a genetic cross.
8. A situation in which both alleles for a gene are expressed equally
9. a sequence of DNA that determines a trait and is passed from parent to offspring
11. allele an allele that is hidden when the dominant allele is present
12. the process in sexual reproduction in which an egg cell and a sperm cell join to make a new cell
15. Having two identical alleles for a particular gene
16. An organism’s genetic makeup, or allele combinations
18. allele a trait that always shows up in the organism if the allele is present
19. a specific characteristic that an organism can pass to its offspring through its genes.
20. An organism’s physical appearance, or visible traits.

1. the different forms of a gene
2. alleles Three or more possible alleles if a gene that determine a trait.
4. an offspring of crosses that has two different alleles for a trait
5. an offspring of many generations that have the same form of a trait
6. a number that describes the likelihood of an event happening
7. inheritance The inheritance of traits that are controlled by two or more genes, such as height in humans.
10. Having two different alleles for a particular gene
13. dominance A situation in which one allele is not completely dominant over another allele
14. the scientific study of heredity
17. the passing of traits from parents to offspring