1. Genes and Traits review

2. A physical characteristic of a living thing is a ______________?

3. Answer: Trait

4. A _________ trait is a trait that is passed from a parent its offspring.

5. Answer: inherited

6. The passing of traits from one generation to another is called ____________.

7. Answer: Heredity

8. A rod shaped structure in the nucleus that holds DNA is called a ___________________.

9. Answer: Chromosome

10. How many pairs of chromosomes do humans have?

11. Answer: 23

12. 1. A ___________ gene is a stronger gene that appears more often.
2. A ___________ gene is a weaker gene that appears less often.

13. Answer:
1. Dominant
2. Recessive

14. These are chemical modules in the chromosomes that determine heredity traits.

15. Answer: DNA

16. Babies of parents are called ________________.

17. Answer: Offspring

18. This is the way an animal acts.

19. Answer: Behavior

20. A _______________ behavior is a behavior that is inherited.

21. Answer: Instinct