Across
- 3. The visible form of an allele, ei., blue or brown eyes
- 5. Change in allele frequencies when individuals from a large population settle in a new environment
- 7. This mechanism of evolution occurs in small populations in which an allele can be fixed in a population by chance. Natural Selection has no effect in this process
- 10. All the organisms sharing similar genotype or similar alleles
- 11. An alternative form of a gene
- 12. Survival of the fittest
Down
- 1. A change in the structure of a gene that can increase fitness in the carrier of this change. Natural Selection acts if the mutation is good
- 2. This is what Natural Selection needs to work, without this component, Natural Selection doesn't exist
- 4. Evolution has no intends or direction or end to perfection
- 6. The genetic make up of an allele, the genes in the chain of the DNA determining a phenotype
- 8. Change in allele frequencies in a population
- 9. A measure of an individual's ability to survive and reproduce