Across
- 13. the production of new organisms by the combination of genetic information of two individuals of different sexes
- 14. one of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.
- 15. a nucleus enclosed within the nuclear membrane and form large and complex organisms
- 16. the process by which individuals compete for access to mates and fertilization opportunities
- 17. the reduction in genomic variability that occurs when a small group of individuals becomes separated from a larger population
- 18. Provides important evidence for evolution and the adaptation of plants and animals to their environments throughout time
- 19. the dying out of a species
- 20. how a new kind of plant or animal species is created
Down
- 1. small single-celled organisms
- 2. organism adapts to its environment through selectively reproducing changes in its genotype
- 3. extreme example of genetic drift that happens when the size of a population is severely reduced
- 4. the biological mechanism by which organisms adjust to new environments or to changes in their current environment
- 5. asexual reproduction by a separation of the body into two new bodies
- 6. provides the raw material for natural selection and thus is a key focus of evolutionary theory
- 7. the reduction in genomic variability that occurs when a small group of individuals becomes separated from a larger population
- 8. the change in frequency of an existing gene variant in the population due to random chance
- 9. a mode of reproduction in which a new offspring is produced by a single parent
- 10. provides a record of how creatures evolved and how this process can be represented by a 'tree of life', showing that all species are related to each other
- 11. variations the diversity in a particular characteristic among individuals within a population
- 12. any movement of individuals, and/or the genetic material they carry, from one population to another