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Genetics Test Review

Total questions: 52

Worksheet time: 50mins

Name
Class
Date
1.

The biological sex of a child is determined by

a)

whether the father passes down an x or y chromosome

b)

whether the mother passes down an x or y chromosome

c)

the age of the parents

2.

Males are more likely to suffer from a sex-linked disease or disorder because

a)

males have 2 X chromosomes, so they are twice as likely to receive the disease

b)

males have less DNA

c)

males have 1 X chromosome, so the disorder is more likely to be expressed

d)

Males have a Y chromosome to cancel out the genes on the X chromosome

3.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be 
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
4.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?
a)
XHXh
b)
XhXh
c)
XHXH
d)
XhY
5.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?
a)
XHXh
b)
XhXh
c)
XHY
d)
XhY
6.

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X R X r ?

a)

male with white eyes

b)

female with red eyes

c)

male with red eyes

d)

female with white eyes

7.

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X R Y ?

a)

male with white eyes

b)

female with white eyes

c)

male with red eyes

d)

female with red eyes

8.

What is the genotype of a white eyed male fly?

a)

X R X r

b)

X R X R

c)

Xr X r

d)

X r Y

e)

XR Y

9.

Colorblindness is a sex-linked recessive trait. A colorblind woman marries a male with normal color vision. What is the percent chance of them having a color blind son?

a)

0%

b)

25%

c)

50%

d)

75%

e)

100%

10.

Muscular dystrophy is a sex-linked recessive disorder. A man with muscular dystrophy marries a woman who doesn’t have this disease. Half of their daughters and half of their sons develop this disease. What is the genotype of the mother?

a)

XNXN

b)

XNXn

c)

Xn

d)

XN

11.

Which sex chromosomes do males have?

a)

XX

b)

XY

12.

X-Linked traits are more common in

a)

males

b)

females

13.
Based on the following Punnett square, what percentage of the offspring will have this recessive disease?
a)
0%
b)
25%
c)
50%
d)
75%
14.
Duchenne muscular dystrophy is a recessive x-linked disorder.
According to the Punnett square, what percentage of male offspring will have the disorder?
a)
0%
b)
25%
c)
50%
d)
100%
15.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXB
b)
XbXb
c)
XbY
d)
XBY
16.
What type of inheritance do two alleles have if their traits blend together? 
a)
Incomplete Dominance
b)
Co-Dominance
c)
Mendelian Inheritance
d)
Homozygous Inheritance
17.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
c)
Independent assortment
d)
Recessive inheritance
18.
A plant shows incomplete dominance in size. A tall plant (TT) is crossed with a medium plant (TS). What fraction of plants will also be tall?
a)
100 %
b)
75%
c)
50%
d)
25%
19.
A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance.  What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
20.
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
21.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
22.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
23.
Snap dragon color is a incomplete dominant trait.  A red flower (RR) is crossed with white flower (rr)? What color are flowers that are Rr?
a)
Red
b)
Red and White
c)
White
d)
Pink
24.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
25.
This is an example of ___________.
a)
 Incomplete Dominance
b)
 Codominance
26.
Which of the following is a hybrid?
a)
BB
b)
bb
c)
Bb
27.

The different forms of a gene are called ---

a)

traits

b)

hybrids

c)

alleles

28.

Codominance occurs in calico cats, which allows for the Black and Tan colors to show. What percentage of the offspring represented in this P square will be calico (black and tan spotted)?

a)

25%

b)

50%

c)

75%

d)

100%

29.

Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be black?

a)

25

b)

50

c)

75

d)

100

30.

A HETEROZYGOUS individual would have the genotype:

a)

Hh

b)

hh

c)

HH

d)

Hi

31.

In humans, blue eyes are a recessive trait. What genotype would a blue eyed child have?

a)

BB

b)

Bb

c)

bb

d)

None of the above, brown eyes are dominant.

32.

In pea plants, tall (T) plant alleles are dominant to short (t) plant alleles. If two tall plants (each with the genotype Tt) are crossed, what is the probability that the cross would result in a short pea plant?

a)

25%

b)

50%

c)

75%

d)

100%

33.

Brown eyes (B) are dominant to blue eyes (b). Determine the phenotype for a child with the genotype - Bb

(a)  

34.

If tall eyeballs (T) are dominant to short eyeballs (t), give the genotypes that are possible for tall eyeballs.

(a)  

35.

How many alleles do you inherit from EACH parent for a specific trait?

a)

1

b)

2

36.

A tool used to predict the probability of offspring inheriting certain traits is called a ...

a)

karyotype

b)

Punnett Square

37.

The physical expression of a trait is called the ...

a)

genotype

b)

phenotype

38.

Genotype: TT

a)

homozygous dominant

b)

homozygous recessive

c)

heterozygous dominant

39.

In a population of bees, long wings (L) are dominant over short wings (l).  Bees with long wings are ...

a)

heterozygous only (Ll)

b)

homozygous 

dominant only (LL)

c)

heterozygous or 

homozygous 

dominant (LL or Ll)

40.

Genotype: rr

a)

homozygous dominant

b)

homozygous recessive

c)

heterozygous dominant

41.

Which of the following is the best definition for MEIOSIS?

a)

the process of two haploid cells uniting

b)

the counting of chromosomes within a diploid cell

c)

a two-step process that reduces the number of chromosomes in half such that there is only one copy of all the chromosomes

d)

the equational division of a cell into two identical copies

42.
Which of the following cells is a gamete?
a)
egg
b)
bone
c)
heart
d)
muscle
43.
In mitosis cells are genetically _______, but in meiosis cells are genetically ______.
a)
diverse, identical
b)
identical, diverse/different
44.
The cells produced via meiosis are called:
a)
sex cells
b)
somatic cells
c)
body cells
d)
skin cells
45.
Meiosis makes sperm and egg cells. In humans, sperm and egg cells each have _____ chromosomes. Therefore a fertilized human egg cell (sperm and egg cell combined) would create a cell with _____ chromosomes.
a)
23, 46
b)
46, 23
c)
2, 4
d)
50, 100
46.

What stage of meiosis is this?

a)

Anaphase II

b)

Anaphase I

c)

Metaphase I

d)

Prophase II

47.

What stage of meiosis is this?

a)

Cytokinesis II

b)

Telophase I

c)

Telophase II

d)

Prophase II

48.
Name this phase of meiosis.
a)
Prophase 1
b)
Metaphase 2
c)
Metaphase 1
d)
Anaphase 1
49.

What is the Genotype for Homozygous "B" allele

a)

IᴬIᴮ

b)

Iᴮi

c)

IᴬIᴬ

d)

IᴮIᴮ

50.

What is the Genotype for Heterozygous Type A Blood

a)

IᴬIᴮ

b)

Iᴬi

c)

IᴬIᴬ

d)

IᴮIᴮ

51.

What is the Genotype for Type 0

a)

IᴬIᴮ

b)

Iᴬi

c)

IᴬIᴬ

d)

ii

52.

What is the Genotype for Type A that had a type O parent

a)

IᴬIᴮ

b)

Iᴬi

c)

IᴬIᴬ

d)

ii

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