Science Time

2. A characteristic or feature
4. A certain region of a chromosome that causes a certain protein to be made
7. when an egg cell and sperm cell combine to develop an offspring
9. A type of molecule in our food that our bodies need
11. A common feature inside most cell; it’s where all the chromosomes are located inside the cell
12. The study of heredity
14. Differences within a trait
16. Different forms of genes that can cause different forms of protein, which leads to variations in a trait, like extra-big muscles or typical muscles
17. an organ profile of an individual’s chromosomes
19. a change in DNA that can create a new trait or change an existing trait
20. The way an individual looks for a specific trait

1. Having different alleles for a gene
3. A trait that is only expressed when two recessive alleles are present
5. The combination of alleles that an individual has
6. a trait that is only expressed when at least one dominant allele is present
8. A common feature of most cells that is copied when new cells are made; they are physical structures that are passed from parents to offspring in egg and sperm cells
10. A model that represents a cross or breeding event
13. Having two of the same alleles for a gene
15. A self- replicating material that is present in nearly all organisms
18. A original (model) of biological relationships