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Ch. 12 Genetics Test Review

Total questions: 40

Worksheet time: 25mins

Name
Class
Date
1.

A _______________ is the genetic makeup of an organism.

a)

phenotype

b)

trait

c)

characteristic

d)

genotype

2.

A sex cell is called a _____________.

a)

chromosome

b)

gamete

c)

allele

d)

gene

3.

An organism with two different alleles for a specific trait is considered to be __________________.

a)

homozygous

b)

heterozygous

c)

haploid

d)

diploid

e)

identical

4.

A white mouse whose parents are both white produces only brown offspring when mated with a brown mouse. The white mouse is most probably _______________.

a)

heterozygous

b)

haploid

c)

homozygous recessive

d)

homozygous dominant

5.

Circles on a pedigree represent _______________.

a)

females

b)

siblings

c)

parents

d)

males

6.

A _________________ trait will overpower the other trait.

a)

obsessive

b)

recessive

c)

dominant

d)

master

7.

A _______________________ organism has two of the same alleles for a specific trait.

a)

heterozygous

b)

homozygous

c)

hybrid

8.

An physical characteristic that is expressed by an organism is its _____________.

a)

phenotype

b)

genotype

c)

trait

d)

gene pair

9.

The Austrian monk, ______________, studied the science of hereditary traits.

a)

Gregory Mentz

b)

Gary Manis

c)

Gregor Mendel

d)

Gary Mendel

10.

Which of the following will be a homozygous individual?

a)

TT

b)

Tt

c)

tt

11.

In a dihybrid cross between an individual that has the genotype “AABB” and an individual that has a genotype “aabb”, the resulting offspring will be:

a)

homozygous dominant

b)

homozygous recessive

c)

heterozygous recessive

d)

heterozygous

12.

Which of the following genotypes would represent a female who suffers from hemophilia?

a)

XHXH

b)

XHXh

c)

XhXh

d)

XHY

e)

XhY

13.

In order for a male to be colorblind, where did he have to inherit the colorblind trait from?

a)

He got the trait from both of his parents.

b)

He gets the trait from his father.

c)

He gets the trait from his mother, who has to be at least a carrier.

d)

He does not get the trait from his parents, this is a mutation.

14.

When working with pedigrees, what did Ms. Danielle teach to the class the order of how to solve the genotypes of individuals?

a)

males first, then females ("SUPERIOR GENDER!!!" - Connor Duvall

b)

affected individuals, males, then females

c)

affected individuals, females, then males

d)

females first, then males

e)

there is no order of how to solve pedigrees

15.

According to incomplete dominance, if a red flower is crossed with a pink flower, what will their offspring look like?

a)

all pink

b)

1/4 pink, 1/4 red, 2/4 white

c)

2/4 pink, 2/4 red

d)

all red

16.

Males are represented by this shape on a pedigree...

a)

circle

b)

square

c)

triangle

17.

In order to show a recessive trait, the individual must….

a)

do nothing; a recessive trait cannot show up

b)

have all lowercase letters

c)

have at least one little letter (heterozygous)

d)

have all capital letters

18.

If an organism’s genotype is DDGg, which of the following are alleles that could be produced?

a)

DG

b)

dG

c)

DD

d)

GG

19.

The principal of ____________________ states that some alleles are dominant and can cover up a recessive trait.

a)

dominance & recessiveness

b)

segregation

c)

independent assortment

20.

The principal of ___________________ states that every individual carries 2 alleles for each trait. These alleles separate during the formation of gametes.

a)

dominance & recessiveness

b)

segregation

c)

independent assortment

21.

The principal of ____________________ states that the alleles for one gene had no effect on the alleles of another gene.

a)

dominance & recessiveness

b)

segregation

c)

independent assortment

22.

When genes seem to "blend together" and create a new heterozygous offspring.

a)

incomplete dominance

b)

codominance

c)

polygenic

d)

multiple alleles

23.
What does heterozygous mean?
a)
An organism that has the same genes for a trait (TT or tt)
b)
An organism that has different genes for a trait (Tt)
c)
When neither gene is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
24.
A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?
a)
25%
b)
50%
c)
75%
d)
100%
25.
This is an example of what?
a)
Complete dominance
b)
Incomplete dominance
c)
Codominance
d)
None of the above
26.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
27.
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%
28.
A corn plant heterozygous for tall sprouts mates with a corn plant with short sprouts. If tall sprouts are dominant, how many different phenotypes are possible in the offspring?
a)
1
b)
2
c)
3
d)
4
29.
If a Homozygous red snapdragon and a Heterozygous pink snapdragon were crossed - what percentage of the offspring would be homozygous white?
a)
0%
b)
25%
c)
50%
d)
75%
30.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
31.
Squidward has light blue skin, and his genotype for this trait is Bb. Would Squidward be considered a purebred or hybrid for light blue skin?
a)
Purebred
b)
Hybrid
32.
Magda is a tall, 11 year old drummer. She has a scar on her right cheek. She is good at swimming. Which of her traits did Magda most likely inherit?
a)
height
b)
the scar
c)
ability to swim
d)
ability to play drums
33.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
34.
Which of the following is a phenotype?
a)
Bb
b)
Black fur
35.
What is the percentage of offspring that have green pods?
a)
100%
b)
75%
c)
50%
d)
25%
36.
What percentage of the offspring in the punnett square are shown as a hybrid?
a)
100%
b)
75%
c)
50%
d)
25%
37.
What is the phenotype of the heterozygous parent in the punnett square?
a)
green
b)
yellow
c)
hybrid
d)
purebred
38.

Pick the two types of traits

a)

Rare

b)

Dominant

c)

Recessive

d)

Common

39.

Dominant alleles use a ___________ letter

a)

Capital

b)

Lower case

c)

Green

d)

Red

40.

Define Dominant

a)

An organism that had two identical alleles for that trait

b)

A trait that shows up in the organism when the allele is present

c)

An allele that is covered up

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