Across
- 3. differences between individuals
- 7. variation in discrete groups e.g. eye colour
- 8. a form of breeding animals for the best traits
- 10. a different form of the same gene
Down
- 1. charles had this name and he sailed in the beagle
- 2. this structure is made up of DNA
- 4. gradual changes in a species over millions of years
- 5. part of a cell that contains chromosomes
- 6. the birds darwin studied
- 9. a section of a chromosome which codes for a characteristic