Across
- 2. an organisms physical appearance
- 3. offspring produced by two different species
- 5. characteristics controlled by one single gene
- 8. characteristics passed on from our parents
- 9. an example of an acquired characteristic
- 10. two different alleles for a characteristic
- 11. characteristics controlled by more than one gene
- 12. rod shaped structure found in the nucleus of a cell
- 18. an allele that always produces a certain phenotype
- 19. difference forms of the same gene
Down
- 1. a feature of an organism that can be either continuous or discrete
- 4. an allele whose effect on the phenotype can be masked by dominant alleles
- 6. a section of chromosome that codes for a particular characteristic
- 7. set of genes that the organism has
- 13. an example of continuous variation
- 14. a group of living organisms which can interbreed to produce fertile offspring
- 15. characteristics developed as a result of our environment
- 16. two identical copies of a gene
- 17. the cell type that has 23 chromosomes