Across
- 3. The different form that a gene can take (eg blue eyes)
- 4. the stuff that encodes our genetics (deoxyribonuceic acid)
- 6. having many differences in a species to ensure its survival
- 9. Having different copies of an allele for a given trait
- 10. the combination of alleles an individual has
- 13. A base unit of dna consisting of a sugar, phosphate and a base
- 14. An allele which is always expressed regardless of the combination
- 16. An allele only expressed if no dominant alleles are present
- 17. A long strand of dna with many similar or related genes (often represented as an x shape)
- 18. A permanent change in dna due to environmental factors
Down
- 1. The physical expression of the alleles; How they look
- 2. making an exact copy of an organism
- 5. Breeding to be Homozygous for a given trait
- 7. Letters for the bases in dna: adenosine, thymine, cytosine, guanine
- 8. Having two of the same copies of an allele for a given trait
- 11. A tool used by geneticists to determine possible alleles of offspring
- 12. A section of dna that encodes for a specific trait
- 15. where the dna resides in a cell