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Genetics Review

Total questions: 45

Worksheet time: 2hrs 30mins

Name
Class
Date
1.

The passing on of traits and behaviors from parents to their offspring is

a)

offspring

b)

heredity

c)

DNA

d)

genes

2.

Is weak, prefers to "hide"

a)

dominant genes

b)

trait

c)

recessive genes

d)

genes

3.

Only takes 1 in a gene pair for a trait to show up

a)

recessive genes

b)

DNA

c)

offspring

d)

dominant genes

4.
The genotype of an organism describes the
a)
codons that make up the genes
b)
number of gene's on the chromosmes
c)
genetic make-up of a trait
d)
type of chromosomes in the nucleus
5.
Which best explains why children resemble their parents?
a)
they eat same foods
b)
they have similar DNA
c)
they speak the same language
d)
they have the same interests
6.

Which term describes the different forms of a gene

a)

Chromosome

b)

Allele

c)

DNA

d)

Punnett Squares

7.

Aa, DD, Bb, yy are all examples of _______

a)

genotypes

b)

phenotypes

8.

If something is heterozygous, it is also _____

a)

purebred

b)

hybrid

c)

dominant

d)

recessive

9.

If something is homozygous, it can also be called____

a)

phenotype

b)

genotype

c)

hybrid

d)

purebred

10.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
11.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
12.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
13.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
14.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
15.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
16.
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%
17.
G = green, g = yellow
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
18.
Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
19.

Punnett Square #1

In plants tall is dominant to short.

Cross two heterozygous plants.

What is the genotypic ratio?

a)

1:2:1

b)

2:2

c)

3:1

20.

Which of the choices is heterozygous?

a)

BB

b)

Bb

c)

bb

21.

Which of the choices is homozygous recessive?

a)

BB

b)

Bb

c)

bb

22.

Which of the choices is homozygous dominant?

a)

BB

b)

Bb

c)

bb

23.

Which of the choices are dominant? (there may be more than one)

a)

BB

b)

Bb

c)

bb

24.

Objective #13

This is a pedigree that follows blue eyes which is a recessive trait. What is the genotype of the father (square) in generation 1?

a)

Aa

b)

AA

c)

aa

d)

A?

25.

Objective #13

This is a pedigree that follows blue eyes which is a recessive trait. What is the genotype of the mother (circle) in generation 1?

a)

Aa

b)

AA

c)

aa

d)

A?

26.

Objective #13

This is a pedigree that follows blue eyes which is a recessive trait. What are the genotypes of the parents (1&2) in generation 2?

a)

Aa, AA

b)

aa, aa

c)

AA, AA

d)

Aa, Aa

27.

When red snapdragons are crossed with white snapdragons, the offspring produce pink flowers. This is an example of:

a)

complete dominance

b)

incomplete dominance

c)

codominance

d)

polygenic inheritance

e)

multiple alleles

28.

When red cows are crossed with white cow, the offspring have a mix of red hair and white hair. These cows are called roan. This is an example of:

a)

complete dominance

b)

incomplete dominance

c)

codominance

d)

polygenic inheritance

e)

multiple alleles

29.

Human eye color is controlled by three different genes, and affected by a dozen more. This is an example of:

a)

complete dominance

b)

incomplete dominance

c)

codominance

d)

polygenic inheritance

e)

multiple alleles

30.

The gene for human blood type has three alleles, A, B and O. This is an example of:

a)

complete dominance

b)

incomplete dominance

c)

codominance

d)

polygenic inheritance

e)

multiple alleles

31.

This flower is produced by crossing a pink-flowering plant and a white-flowering plant. This is an example of:

a)

complete dominance

b)

incomplete dominance

c)

codominance

d)

polygenic inheritance

e)

multiple alleles

32.

If a dark brown horse and a white horse are bred, the offspring are palomino (tan). This is an example of:

a)

complete dominance

b)

incomplete dominance

c)

codominance

d)

polygenic inheritance

e)

multiple alleles

33.

Checkered chickens have an allele for black feathers and an allele for white feathers. This is an example of:

a)

complete dominance

b)

incomplete dominance

c)

codominance

d)

polygenic inheritance

e)

multiple alleles

34.
What is NOT a possible genotype for someone with type B blood?
a)
IBIB
b)
IAIB
c)
IB i
d)

All of these are examples of type B blood

35.

Which of the following is true about blood type O?

a)

It contains antigen A only.

b)

It contains antigen B only.

c)

It contains both antigen A and antigen B.

d)

It doesn’t contain antigen A or antigen B.

36.

If a father is IAIA and a mother is IAIB, what is the probability for a child with AB blood?

a)

0%

b)

25%

c)

50%

d)

75%

37.
If two parents have type AB blood, what is the probability that their child will have type O blood?
a)
0%
b)
25%
c)
50%
d)
100%
38.
If two parents are heterozygous for type A blood, what is the probability that their offspring would have type O blood?
a)
100 %
b)
75%
c)
50%
d)
25%
39.
Jim has type AB blood. His dad could be type O.
a)
True
b)
False
40.

How many alleles does a person carry for a trait?

a)

1

b)

2

c)

3

d)

4

41.
What do we use pedigrees for?
a)
To look at families
b)
To make determinations about the offspring
c)
To track traits in families
d)
Nothing
42.

On a pedigree, this symbol represents a ---

a)

not affected female.

b)

not affected male.

c)

affected male.

d)

affected female.

43.

On a pedigree, this symbol represents a ----

a)

not affected male.

b)

not affected female.

c)

affected male.

d)

affected female.

44.
There are no carriers for Huntington's Disease- you either have it or you don't. Is Huntington's disease caused by a dominant or recessive trait?
a)
Dominant
b)
Recessive
45.
How are individuals I-2 and III-5 related?
a)
Grandpa and grandson
b)
Mom and son
c)
Uncle and nephew
d)
Grandma and grandson

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