Across
- 4. an allele that shows a different phenotype when the individual has one copy than when it has two (278)
- 5. abbreviation for deoxyribonucleic acid (326)
- 7. having two different alleles (279)
- 9. two individuals that mate to form offspring (271)
- 12. a sperm or egg cell (271)
- 14. the synthesis of mRNA from DNA (337)
- 16. an allele that shows the same phenotype whether the individual has one copy or two (278)
- 17. the organism’s allele pairs (279)
- 18. a permanent change in a cell’s DNA (345)
Down
- 1. the observable characteristic or outside expression of an allele pair (279)
- 2. strands of RNA that are formed complementary to one strand of DNA (336)
- 3. the study of heredity, genes and variation in organisms (266)
- 6. the joining of an egg and a sperm (271)
- 8. segment of a DNA molecule that controls the production of a protein (270)
- 10. an alternative form of a single gene (278)
- 11. where mRNA codes for the production of protein (338)
- 13. having two copies of the same allele (279)
- 15. the final product of gene expression (339)