6-4 Heredity (no spaces)

6. If you and your twin are monozygotic (one egg), you have a(n) _____ twin.
8. You have the genotype for ___ , but it is not expressed as a phenotype, because your diet is healthy.
9. Psychologists study identical _____ to determine if behavior comes from environment or heredity.
12. Blond hair is less common, because the gene for blond hair is ___ .
13. You cannot change your genes, but you can change environment, which then changes your ___ .
16. Current psychologists believe behavior can only be explained by both heredity and _____ .
18. Brown hair is more common, because the gene for brown hair is ___ .
19. Genes from your parents are your ______ , & they determine your pigmentation and facial features.
20. John Watson believed all behavior came from _____ , because he could teach it to anyone.

1. Galton believes that all behavior came from ____ , because he traced it through family trees.
2. _____ means “two eggs”, and results in fraternal twins.
3. Identical twins raised in different ___ , shared common behaviors, which shows genetics at work.
4. ___ siblings do not share the genetics of parents, which shows the impact of environment on behavior.
5. ___ ___ is related to chromosomes, but it is also affected by environment (mom’s age).
7. Reginald Punnett taught us that a dominant gene _____ a recessive gene (or weaker gene).
10. ___ mice produce predictable results in offspring, but more abnormalities.
11. If you shared a womb with your twin, but not the same egg, you have a(n) _____ twin.
14. Behavior is _____ if the source of the behavior is the environment, and not a parent.
15. Behavior is _____ if it is transmitted through genes from a parent to a child.
17. If you can see the results of your genes, expressed in your appearance, this is your _____ .