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Worksheets

Heredity

Total questions: 30

Worksheet time: 30mins

Name
Class
Date
1.

Mendel chose mice, then settled for pea plants, when studying heredity. Morgan used fruit flies. Which of the following is NOT a reason they chose these organisms?

a)

short life cycles

b)

small

c)

easy to care for

d)

lots of offspring

e)

long life span

2.

The instructions found in DNA on how to build a protein.

a)

gene

b)

allele

c)

genotype

d)

phenotype

3.

A variety, or flavor, of a gene. For example: A, B, or O.

a)

gene

b)

allele

c)

genotype

d)

phenotype

4.

TT, AB, and Nn are examples.

a)

haploid

b)

diploid

c)

genotype

d)

phenotype

5.

Scientific term for traits expressed in an individual.

a)

haploid

b)

diploid

c)

genotype

d)

phenotype

6.

Two terms describing sex cells.

a)

haploid, gamete

b)

diploid, zygote

c)

haploid, zygote

d)

diploid, gamete

7.

Humans are

a)

haploid

b)

diploid

c)

triploid

d)

tetraploid

8.

Pea plant guy.

a)

Gregor Mendel

b)

Thomas Hunt Morgan

c)

Millard Fillmore

d)

Groucho Marx

9.

Fruit fly guy.

a)

Gregor Mendel

b)

Thomas Hunt Morgan

c)

Millard Fillmore

d)

Groucho Marx

10.

Describes pattern of inheritance where only one allele is necessary to fully express the trait.

a)

dominant

b)

recessive

c)

multiple alleles

d)

X-linked

e)

polygenic

11.

Pattern of inheritance in which one copy of a recessive allele is enough to express the recessive trait.

a)

dominant

b)

recessive

c)

multiple alleles

d)

X-linked

e)

polygenic

12.

Low levels of skin pigment, poor eyesight. Watch out for sunburn!

a)

cystic fibrosis

b)

Tay-Sachs

c)

Huntington's

d)

albinism

13.

Causes a sticky mucous to build up in the lungs and digestive tract. Generally fatal by mid twenties.

a)

Tay-Sachs

b)

Huntington's

c)

cystic fibrosis

d)

hemophilia

14.

Rabbit fur color and the ABO blood type follow this pattern of inheritance

a)

autosomal dominant

b)

autosomal recessive

c)

incomplete dominance

d)

multiple alleles

15.

Paul is Nn for albinism. Tina is Nn. What is the chance of their child having albinism?

a)

0%

b)

25%

c)

50%

d)

100%

16.

Lucy is NN for Tay-Sachs. Ricky is Nn. What percentage of their children will have Tay-Sachs?

a)

0%

b)

25%

c)

50%

d)

100%

17.

Which autosomal recessive disorder destroys the brain, killing children by around the age of 5?

a)

Tay-Sachs

b)

cystic fibrosis

c)

Duchenne muscular dystrophy

d)

hemophilia

18.

This is a pedigree for an autosomal recessive trait. How many definite carriers are there in the pedigree?

a)

one

b)

two

c)

three

d)

four

e)

five

19.

Autosomal means what?

a)

found on the X chromosome

b)

found on the Y chromosome

c)

found on any chromosome that does not determine gender

d)

not based on genotype

20.

A cross between RR and WW produced this flower. What is the pattern of inheritance?

a)

autosomal dominant

b)

autosomal recessive

c)

incomplete dominance

d)

codominance

e)

multiple alleles

21.

A cross between BB and WW produced this animal. What is the pattern of inheritance?

a)

dominant / recessive

b)

X-linked

c)

incomplete dominance

d)

codominance

e)

multiple alleles

22.

This is a pedigree of a recessive trait. Every individual in the second generation would have this genotype.

a)

DD

b)

Dd

c)

dd

d)

DK

23.

Which of the following statements describes the genetic disorder being tested with the picture?

a)

red-green colorblindness, X-linked recessive

b)

red-green colorblindness, autosomal recessive

c)

red-green colorblindness, X-linked dominant

d)

Tay-Sachs, multiple alleles

24.

Which of the following describes a disorder in which the blood doesn't clot properly?

a)

cystic fibrosis, autosomal recessive

b)

Huntington's, autosomal dominant

c)

hemophilia, X-linked recessive

d)

Duchenne muscular dystrophy, X-linked recessive

25.

Charlie has blood type A. Cecilia has blood type B. Their child has blood type O. Which of the following is true?

a)

Charlie is AA, Cecilia is BB

b)

Charlie is AB, Cecilia is AB

c)

Charlie is Ao, Cecilia is Bo

d)

Cecilia has some explaining to do. . .

26.

Which of the following statements about Huntington's is false?

a)

it destroys the brain

b)

symptoms don't appear until middle age

c)

it is autosomal dominant

d)

if you have it, so will half of your children

e)

if you have it, so will your children

27.

What genetic disorder is shown in the picture?

a)

albinism

b)

Met-Hb

c)

cystic fibrosis

d)

hemophilia

28.

Two red-eyed fruit flies breed. Their genotypes are as follows: XRXr x XRY. What percentage of their offspring will have white eyes?

a)

0%

b)

25%, all female

c)

25%, all male

d)

50%, both male and female

29.

A girl has red-green colorblindness. Which of the following genotypes for the parents could produce her?

a)

XNXN, XNY

b)

XNXn, XNY

c)

XNXN, XnY

d)

XNXn, XnY

30.

Which of the statements about the picture is false?

a)

it shows sickle-cell anemia

b)

the pattern of inheritance is codominance

c)

carriers of this trait are resistant to malaria

d)

carriers of this trait are generally symptom-free

e)

it is caused by inbreeding

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