Chapter 1 Lesson 4



Chapter 1 Lesson 4 Quiz

Name: __________________________ Homeroom: _________

Use the following words to complete questions #1 - #10. Some words will be more than once and some will not be used at all.

G. Mendel R. Hooke B. Nye recessive

Dominant 3:1 25,000 35,000

4:1 pea bean 15,000

Pumpkin genetics heredity traits

DNA purple white chromosomes

1. Write dominant or recessive (in humans) for the following traits:

Brown hair _________________________

Red hair _________________________

Brown eyes _________________________

Blonde hair _________________________

2. _____________________ is considered the father of genetics.

3. Mendel chose __________________________ plants to study.

4. There are about __________________ genes on human DNA.

5. _______________________________ is the study of heredity.

6. What was the ratio that Mendel discovered during the second generation of his pea plant experiment? _________________

7. Mendel’s “factors” for inheritance are what we now call ________________________.

8. A “stronger” trait is called the _____________________ trait.

9. A “weaker” trait is called the ______________________ trait.

10. The trait that needs two factors for it to be expressed is ___________________________.

Complete the following Punnett square for hair color.

B = Brown hair

b = blonde hair

B b

| | |

| | |

What fraction of the offspring would have brown hair?

_____________________

What fraction of the offspring would have blonde hair?

_____________________

Is it possible for the offspring to have red hair?

_____________________

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B

b

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