Across
- 2. when an organism has two identical alleles for a particular gene.
- 5. changes to the genetic material of an organism.
- 6. the physical characteristics of an organism.
- 9. when an organism has two different alleles for the same gene.
- 10. the location on the chromosome that contains the instructions for a particular trait.
Down
- 1. a tool scientists use to investigate the possible combinations of genetic crosses.
- 3. the descendants of a person, animal, or plant.
- 4. the genetic makeup of an organism.
- 7. the allele whose expression is masked by the dominant allele.
- 8. the allele that masks the expression of the recessive allele.