Vocab science

1. : The two alleles that control the phenotype of a trait.
9. : The study of similarities and differences among structures of living and fossil species.
11. : An adaptation that enables a species to blend in with its environment.
15. : When the last individual organism of a species dies.
18. : How a trait appears, or is expressed.
19. : Are body parts that have lost their original function through evolution.

2. : The process by which individuals with variations that help them survive in their environments live longer.
3. : Body parts or structures that were inherited by two or more species from a common ancestor.
4. : Body parts that perform a similar function but differ in structure.
5. : Slight differences in inherited traits among individual members of a species.
6. : Food products that have been genetically engineered.
7. : A fossil that has characteristics of both ancestral organisms and organisms that evolved later.
8. : The resemblance of one species to another.
10. : The different forms of a gene are called alleles.
12. : The biological and chemical methods that change the arrangement of DNA that makes up a gene.
13. : A permanent change in the sequence of DNA.
14. : The selection and breeding of organisms with desired traits.
16. : Thread-like structures that contain genetic information that controls traits.
17. : An inherited trait that helps a species survive in its environment.