Page 169 - Science Course 3 (Book 1)

Mo4-L5: Key Concept Check

Direction: On the line before each trait, write I if the trait describes an inherited trait or A if the trait
describes an acquired trait.

1. color of wings

2. length of hair
3. color of eyes
4. shape of nose
5. loss of limb
6. shape of scar

Direction: Circle the term in parentheses that correctly completes each sentence.

7. Sperm and eggs are human (body/reproductive) cells.

8. Each human sperm and egg contains (23/46) chromosomes.

9. (Mutation/Meiosis) is the process during which sperm and egg cells form.

10. During (meiosis/fertilization), a sperm and an egg unite.

11. Because each sperm cell and egg cell is (unique/similar), the resulting offspring also is (unique/similar).

12. In humans, there are (many/few) potential gene arrangements from the union of sperm and egg
chromosomes.

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