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Ch. 3 The Science of Heredity

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

A symbolic expression of the two alleles an individual possesses for a given gene.

a)

karyotype

b)

phenotype

c)

genotype

d)

F1

2.

Who was the "Father of Genetics"?

a)

Robert Hooke

b)

Charles Darwin

c)

Gregor Mendel

d)

Socrates

3.

This is an example of a(n)

a)

karyotype

b)

Punnett square

c)

times table

4.

Which represents an individual that is heterozygous?

a)

AA

b)

aa

c)

Aa

d)

AEAE

5.

The scientific study of heredity is known as _________

a)

chemistry

b)

ecology

c)

physics

d)

genetics

6.

The process of combining the male gamete (sperm cell) with the female gamete (egg cell) is __________ .

a)

asexual reproduction

b)

fertilization

c)

crossing over

d)

binary fission

7.

The chromosome theory of inheritance states that genes are passed from parents to offspring on

a)

RNA

b)

zygotes

c)

centrioles

d)

chromosomes

8.

In Gregor Mendel's classic experiment, he crossed two "purebred" plants (tall X short). We could also say that they were

a)

homozygous

b)

heterozygous

c)

hybrid

d)

all the same genotypes

9.

The process through which reproductive cells are made is

a)

meiosis

b)

mitosis

c)

fertilization

d)

cell division

10.

Which correctly gives an example of an inherited trait, and then an acquired trait?

a)

dyed hair, ear piercing

b)

eye color, shape of nose

c)

dyed hair, eye color

d)

eye color, dyed hair

11.

The cells produced through meiosis have half the number of chromosomes as body cells.

a)

twice

b)

half

c)

equal to

d)

do not contain chromosomes

12.

Which allele is dominant, green or yellow?

a)

green

b)

yellow

c)

they show incomplete dominance

d)

they are codominant

13.

What trait is being examined in this cross?

a)

yellow pea pods

b)

green pea pods

c)

the length of the stems

d)

the color of the pea pod

14.

Which of the following does NOT lead to diversity between members of a species?

a)

sexual reproduction

b)

crossing over (genetic recombination)

c)

asexual reproduction

d)

random sperm cells fertilizing egg cells

15.

A homozygous recessive individual is crossed with a heterozygous individual. What is the probability of having the recessive trait in the offspring?

a)

100%

b)

75%

c)

50%

d)

25%

16.

What genotype belongs in the top left box?

a)

rr

b)

RR

c)

Rr

d)

R

17.

What genotype belongs in the top right box?

a)

RR

b)

rr

c)

Rr

d)

r

18.

What genotype belongs in the bottom right box?

a)

RR

b)

rr

c)

Rr

d)

r

19.

What is the probability of having an offspring with the dominant trait?

a)

100%

b)

0%

c)

50%

d)

75%

20.

What is the probability of having an offspring with the recessive phenotype when you cross a homozygous dominant with a heterozygous individual?

a)

100%

b)

50%

c)

0%

d)

25%