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Genetics

Total questions: 50

Worksheet time: 1hrs 2mins

Name
Class
Date
1.

Who is known as the "Father of Genetics" for the work he did with pea plants?

a)

Charles Darwin

b)

Gregor Mendel

c)

Albert Einstein

d)

Benjamin Franklin

2.

What is an allele?

a)

a chemical found in DNA

b)

a certain form of a gene that can be recessive or dominant

c)

a physical trait

d)

a pair of chromosomes

3.

A dominant allele.....

a)

is expressed half of the time

b)

is never expressed

c)

is expressed in homozygous dominant and heterozygous individuals

d)

is only expressed in homozygous individuals

4.

If two white mice are bred together (white fur is a recessive trait), what must be true of their offspring?

a)

they will all be white

b)

they could be either white or black

c)

they will all be black

d)

they are likely to be half white and half black

5.

What term denotes the physical expression of a gene?

a)

genotype

b)

phenotype

c)

appearance

d)

homologous

6.

Which of the following would produce a recessive phenotype?

a)

hh

b)

Rr

c)

Ww

d)

BB

7.

Which of the these is homozygous?

a)

gg

b)

Yy

c)

Nn

d)

Ee

8.

What organism did Mendel study?

a)

pea plants

b)

onions

c)

mice

d)

cats

9.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
10.
Heredity is the passing of traits from _____________________ to _____________________
a)
predators to prey
b)
water to rain
c)
parents to offspring
d)
fungi to protists
11.
___________________________ is the field of science that studies of how traits are passed on, or inherited.
a)
dominant traits
b)
ratio
c)
phenotype
d)
genetics
12.
What is a gene?
a)
An entire chromosome that  codes for a trait
b)
a piece of clothing
c)
a piece of a DNA on chromosome that codes for a trait
d)
Chemical messengers in your brain that code for a trait
13.

This type of phenotype is less likely to be appeared in offspring

a)

Dominant genotype

b)

Recessive genotype

c)

Dominant phenotype

d)

Recessive phenotype

14.

Genetics is the study of

a)

heredity

b)

pea plants

c)

viruses

d)

Mendel

15.

Heredity describes how ______ are passed down from parents to offspring.

a)

traits

b)

food & water

c)

inheritance & money

d)

diseases

16.

Another word for trait is

a)

characteristic

b)

treat

c)

genes

d)

jeans

17.

The combination of alleles that an individual has is

a)

phenotype

b)

genotype

c)

homozygous

d)

heterozygous

18.

When an individual has two of the SAME alleles for a trait, the genotype is

a)

phenotype

b)

genotype

c)

homozygous

d)

heterozygous

19.

When an individual has two DIFFERENT alleles for a trait, the genotype is

a)

phenotype

b)

genotype

c)

homozygous

d)

heterozygous

20.

A pea plant has the alleles "BB" for the purple flower trait. This genotype is

a)

homozygous dominant

b)

homozygous recessive

c)

heterozygous

21.

A pea plant has the alleles "bb" for the purple flower trait. This genotype is

a)

homozygous dominant

b)

homozygous recessive

c)

heterozygous

22.

Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.

a)

Protein

b)

DNA

c)

RNA

d)

Glucose nucleic acid (GNA)

23.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
24.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
25.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
26.

T - tall and t = short

In the punnett square below, what belongs in the missing square

a)

tt

b)

Tt

c)

Bb

d)

TT

27.

B = brown eyes

b = blue eyes

One brother has genotype BB and the other brother has genotype Bb.

Which statement is true about these two brothers?

a)

They have same phenotype and genotype

b)

They have different phenotypes and genotypes

c)

They have same phenotype, but different genotypes

d)

They have different phenotypes, but the same genotype

28.

What is the genotypic ratio of the offspring?

a)

3:1

b)

1:3

c)

1:2:1

d)

2:2

29.

What are the phenotype percentages of the offspring?

(A-Brown fur color; a-white fur color)

a)

50 % Brown fur and 50% White fur

b)

25 % Brown fur and 75% White fur

c)

75 % Brown fur and 25% White fur

d)

0% Brown fur and 100% White fur

30.
Each one of the boxes on the Punnett Square represents what probability of an offsprings' genotype?
a)
25%
b)
1%
c)
10%
d)
0%
31.

What is a punnett square?

a)

A chart showing a 100% what your baby will look like

b)

A picture of a man on the subway eating a 18 ft subway sandwhich

c)

A chart that shows possiable number combonations

d)

A chart that shows all the possible combinations of alleles that can result from a genetic cross

32.

What is the mother's genotype?

a)

DD

b)

Dd

c)

dd

33.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
34.

In pea plants, tall is dominant to short. If 2 heterozygous plants are crossed, what % of the offspring will be short?

a)

0%

b)

25%

c)

50%

d)

75%

35.

In pea plants, purple is dominant to white. If a plant has a genotype of Pp, what is its phenotype?

a)

purple

b)

white

c)

purple and white

36.

This chart is called a:

a)

Pedigree

b)

Punnett Square

c)

Karyotype

37.

In the ABO blood type system, how many alleles are there?

a)

1

b)

4

c)

2

d)

3

38.

Genotypes for blood are as follows:

Type A (IAIA OR IAi)

Type B ( IBIB OR IBi)

Type AB (IAIB )

What would be the genotype for Type O blood, knowing that Type O is recessive?

a)

II

b)

Ii

c)

ii

d)

OO

39.

If a person inherits the IA and IB alleles, what blood type will they have?

a)

Type O

b)

Type AB

c)

Type B

d)

Type A

40.
In the Punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
41.
What genotype would go in box 3?
a)
BB
b)
Bb
c)
bb
42.

If you cross a black chicken with a white chicken, only black and white checkered chickens would be produced. What kind of inheritance pattern does this follow?

a)

Incomplete dominance

b)

Codominance

43.
What is the phenotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
4:0
44.
When two dominant alleles express themselves equally, that is called _____.
a)
Co-Dominance
b)
Gene expression
c)
Intermediate Inheritance
d)
Incomplete Dominance
45.
If you cross two heterozygous traits (Rr x Rr), as Mendel did in his second experiment, what ratio will you get between offspring with the dominant and recessive phenotypes
a)
1:1
b)
2:1
c)
3:1
d)
4:1
46.
A trait that is not expressed when a dominant allele is present.
a)
Recessive
b)
Co-dominant
c)
Incomplete Dominant
d)
Dominant
47.

Jim has type AB blood. His dad could be type O.

a)

True

b)

False

48.

Which of the following codes for blood type O?

a)

IA IA

b)

IB i

c)

IA IB

d)

ii

49.

A father has type AB blood and the mother has type O. What percentage of their offspring would you expect to have?

a)

Type A, 25%, Type B 25%, Type AB 25%, Type O 25%

b)

Type A 50%, Type B 25%, Type AB 25%, Type O 50%

c)

Type A blood 50%, Type B 50%, Type AB 0%, Type O Blood 0%

d)

Type A blood 100%

50.

If a father is heterozygous A and the mother is heterozygous B, what are the possible phenotypes of the offspring?

a)

25% AO

25% AB

25% BO

25% OO

b)

50% A

50% B

c)

25% A

25%AB

25% B

25% O

d)

25% A

25% B

50% O

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