Across
- 4. branch of biology that studies heredity
- 6. alternative forms of a gene for each variation of a trait of an organism
- 8. when there are two identical alleles for a trait
- 9. outward appearance of an organism, regardless of its genes
Down
- 1. observed trait of an organism that masks the recessive form of a trait
- 2. when there are two different alleles for a trait
- 3. trait of an organism that can be masked by the dominant form of a trait
- 5. cell with each kind of chromosome
- 7. combination of genes in an organism