Across
- 4. trait of organism that mask recessive form of a trait
- 5. outward appearance of an organism
- 7. combination of genes in an organism
- 9. two different alleles for a trait
- 10. cell division
Down
- 1. cell with two of each kind of chromosome
- 2. alternative forms of a gene for each variation of a trait
- 3. two identical alleles for a trait
- 6. branch of biology studying heredity
- 8. fusion of male and female gametes