Free Printable Genetics

1.

True or False? The scientific study of heredity is called fertilization.

a)

True

b)

False

2.

True or False? A hybrid organism is the offspring of many generations that have the same form of a trait.

a)

True

b)

False

3.

True or False? Capital letters are used to represent recessive alleles.

a)

True

b)

False

4.

True or False? Mendel called an individual that has one dominant allele and one recessive allele for a trait a purebred.

a)

True

b)

False

5.

True or False? Mendel said that the factors that control a trait exist in pairs.

a)

True

b)

False

6.

What Mendel called factors are now

called

a)

heredity

b)

genes

c)

purebred

d)

traits

7.

When parent plants are crossed,

scientists refer to the first generation of

offspring as

a)

P

b)

F2

c)

1F

d)

F1

8.

A seed can be round or wrinkled.

Seed shape is

a)

a trait

b)

an allele

c)

a factor

d)

a gene

9.

The alleles for a hybrid tall pea plant

are represented as

a)

TT

b)

Tt

c)

TS

d)

tt

10.

The physical appearance of an organism is its

a)

genotype

b)

phenotype

c)

offspring

11.

A number that describes how likely it is that an event will occur is the of the event.

a)

probability

b)

possibility

c)

certanity

12.

An organism that is has two identical alleles for a trait.

a)

multizygous

b)

heterozygous

c)

homozygous

13.

A Punnett square shows the combination of that parents can pass on to offspring.

a)

DNA

b)

genes

c)

alleles

14.

The genetic makeup of an organism is its .

a)

genotype

b)

phenotype

c)

offspring

15.

An organism that is has two different alleles for a trait.

a)

dualzygous

b)

heterozygous

c)

homozygous

16.

Which of these genotypes is heterozygous?

a)

AA

b)

Aa

c)

cc

d)

DD

17.

Which of these is NOT a phenotype?

a)

tall

b)

short

c)

homozygous

d)

round

18.

In a cross between individuals that are

Aa × Aa, how many boxes of the Punnett

square will show an offspring that is AA?

a)

1

b)

2

c)

3

d)

4

19.

Which of these is NOT a way to

express probability?

a)

1 in 4

b)

50%

c)

3/4

d)

25

20.

A cow with a mix of red hairs and white hairs has the genotype H^RH^W. This is an example of .

a)

dominant alleles

b)

partial alleles

c)

codominance

21.

Having pierced ears is an example of a(n) trait.

a)

inherited

b)

acquired

c)

environmental

22.

Four alleles determine if a rabbit is white, brown, or gray. This is an example of .

a)

duplicated

b)

multiple

c)

polygenic

23.

The pattern of inheritance in which more than one pair of genes affects a trait is .

a)

multiple genotypes

b)

duplicated traits

c)

polygenic inheritance

24.

If a plant with red flowers crossed with a plant with white flowers produces a plant with pink flowers, it is an example of dominance .

a)

incomplete

b)

partial

c)

controlled

25.

Only changes in cells can be passed to offspring.

a)

blood

b)

sex

c)

muscle

26.

Height in humans is an example of

a)

incomplete dominance

b)

codominance

c)

polygenic inheritance

d)

multiple alleles

27.

The pattern of inheritance in which one allele is only partially dominant is

a)

incomplete dominance

b)

codominance

c)

polygenic inheritance

d)

multiple alleles

28.

The pattern of inheritance in which there are three or more possible alleles for a trait is

a)

incomplete dominance

b)

codominance

c)

polygenic inheritance

d)

multiple alleles

29.

The pattern of inheritance in which both genes are expressed equally is

a)

incomplete dominance

b)

codominance

c)

polygenic inheritance

d)

multiple alleles

30.

Walter Sutton investigated the number of in grasshoppers.

a)

alleles

b)

chromosomes

c)

genes

31.

The process that produces sex cells is .

a)

mitosis

b)

meiosis

c)

mutation

32.

Each chromosome contains two identical .

a)

chromatids

b)

alleles

c)

interphases

33.

True or False? Body cells of humans have 46 pairs of chromosomes.

a)

true

b)

false

34.

True or False? Sex cells have twice the number of chromosomes as body cells.

a)

true

b)

false

35.

True or False? Genes pass from parents to offspring on chromosomes.

a)

true

b)

false

36.

True or False? The two chromosomes in a pair have the same genes lined up in the same order.

a)

true

b)

false

37.

True or False? A fertilized egg has twice the number of chromosomes as the body cells of the parent.

a)

true

b)

false

38.

A purebred chicken with white feathers is crossed with a purebred chicken that has black feathers. Each of their offspring has both black and white feathers. Why does this happen?

a)

Both alleles for feather color are dominant.

b)

Both alleles for feather color are recessive.

c)

The alleles for feather color are neither dominant nor recessive.

d)

Several alleles work together to determine the trait.

Genetics

Total questions: 38

Worksheet time: 19mins

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