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Genetics: The Science of Heredity - Chapter 2

Total questions: 22

Worksheet time: 11mins

Name
Class
Date
1.

What does the notation TT represent?

a)

two dominant alleles

b)

two recessive alleles

c)

a hybrid

d)

heterozygous recessive

2.

What is the probability of producing a tall pea plant from a genetic cross between two hybrid tall pea plants?

a)

1/4

b)

2/4

c)

3/4

d)

4/4

3.

What did Mendel do to study different characteristics in his genetics experiments?

a)

he studied asexual plants only

b)

he studied only tall and short pea plants

c)

he cross pollinated plants

d)

he grew roses that were pink

4.

An organism's genotype is its

a)

genetic makeup

b)

physical appearance

c)

feather color

d)

eye color

5.

Physical characteristics studied in genetics are known as:

a)

traits

b)

offspring

c)

generations

d)

hybrids

6.

What is the chromosome theory of inheritance?

a)

chromosomes are carried from parent to offspring on hybrids

b)

genes are carried from parents to offspring on chromosomes

c)

hybrid pairs of chromosomes combine to form offspring

d)

codominant genes combine to form new allele based heterozygous offspring

7.

What does a Punnett square show?

a)

all the possible outcomes of a genetic cross

b)

only the dominant alleles

c)

only the recessive alleles

d)

all of Mendel's 30,000 crosses

8.

A ___________________ organism is the offspring of many generations of organisms that have the same trait.

a)

dominant

b)

probability

c)

purebred

9.

If a ______________________ allele is present , its trait will appear in the organism.

a)

dominant

b)

purebred

c)

probability

10.

Mendel used the principles of __________ to predict what percent of offspring would show a particular trait.

a)

purebred

b)

hybrid

c)

dominant

d)

probability

11.

A hybrid is the offspring of parents that have ___________ alleles for a trait.

a)

the same

b)

different

c)

two

d)

four

12.

Tt would represent a heterozygous pea plant.

a)

true

b)

false

13.

In Mendel's famous test cross between two purebred pea plants, one tall and one short, all offspring were __________.

a)

short

b)

recessive purebred

c)

tall

d)

medium

14.

An organisms phenotype is its allele combinations.

a)

true

b)

false

15.

Sex cells produced by meiosis have ____________ the number of chromosomes as the parent cells.

a)

twice

b)

half

c)

thrice

d)

100%

16.

If a cross between white flowers (W) and purple flowers (w), which color flower is dominant?

a)

dominant

b)

white

c)

recessive

d)

purple

17.

In a cross between flowers where white is dominant and purple is recessive, which allele combination represents a purple flower?

a)

WW

b)

Ww

c)

Pp

d)

ww

18.

Purebred is the same meaning as _______________.

a)

heterozygous

b)

homozygous

c)

hybrid

19.

Hybrid has the same meaning as _______________.

a)

heterozygous

b)

homozygous

c)

purebred

20.

1/4 is equal to _________.

a)

0%

b)

25%

c)

50%

d)

75%

21.

75% is equal to _________.

a)

1/4

b)

2/4

c)

3/4

d)

4/4

22.

Mendel ______________ pea plants to study traits.

a)

cut

b)

naturally pollinated

c)

crossed