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Unit 7 Genetics Test Review

Total questions: 33

Worksheet time: 29mins

Name
Class
Date
1.

Which best describes the process shown?

a)

mutation in which the DNA content of the gene is ltered

b)

segregation of sister chromatids

c)

condensation and segregation of the alleles

d)

crossing-over which alleles are exchanged

2.
What is one advantage of sexual reproduction?
a)
offspring are identical to parents
b)
offspring are resistant to viruses
c)
offspring are born live, rather than from eggs
d)
offspring inherit a wider variety of genetic information
3.
How many times in meiosis does the cell divided?
a)
2
b)
4
c)
3
d)
1
4.
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%
5.
When two haploid sex fuse together during fertilization they become ______________ 
a)
haploid cells
b)
meiosis
c)
mitochondria
d)
diploid cells
6.

Are gametes (sex cells) haploid or diploid?

a)

Haploid

b)

Diploid

7.

How many haploid daughter cells are produced after meiotic division of one cell?

a)

1

b)

2

c)

3

d)

4

8.

Different versions or forms of the same gene are called —

a)

Sex Cells

b)

Chromosomes

c)

Alleles

d)

Nitrogen Bases

9.

Which sex chromosome combination is for a female?

a)

XY

b)

XX

c)

YY

d)

XXY

10.

The color purple (P) is dominant to the color white (p). According to the Punnett Square, what is the probability of an offspring being white?

a)

0%

b)

25%

c)

50%

d)

75%

11.

A genetic pedigree showing that only males are affected by a certain disorder is evidence of what type of inheritance?

a)

Passive

b)

Dominant

c)

Sex-linked

d)

Recessive

12.

When a black & white speckled chicken is crossed, 25% of the offspring produced will be white, 50% will be black & white, and 25% will have black feathers. These results illustrate

a)

Crossing-Over

b)

Polyploidy

c)

Sex Linkage

d)

Co-dominance

13.

Albino individuals lack all pigmentation so that their hair and skin are white. This family tree shows that albinism —

a)

is a recessive genetic trait

b)

requires both parents to be albinos

c)

is carried only by females in this family

d)

is a sex-linked gene

14.
Which mutation results with deleted sequences of genes of a chromosome? 
a)
Deletion
b)
Duplication
c)
Translocation
d)
Point Mutation 
15.
A mutation caused by a part of a chromosome breaking off and becoming attached to a non-homologous chromosome
a)
Deletion
b)
Duplication
c)
Translocation
d)
Inversion
16.
An organism's appearance is known as its
a)
heredity
b)
phenotype
c)
genotype
d)
pedigree
17.

A individual with Triple X Syndrome (Trisomy X) has how many chromosomes?

a)

47

b)

46

c)

24

d)

45

18.

During which meiotic phase does crossing over occur?

a)

Prophase I

b)

Anaphase I

c)

Metaphase I

d)

Telophase I

19.

A gene is deleted off a part of a chromosome. What is this type of mutation?

a)

Deletion

b)

Duplication

c)

Translocation

d)

Insertion

20.
TT,tt,PP,pp,SS,ss are examples of alleles that are?
a)
homozygous
b)
heterozygous
c)
different
d)
homologous 
21.
Y for yellow body is dominant over y for blue body.  What alleles would produce yellow bodies?
a)
YY,yy
b)
Yy,yy
c)
YY only
d)
YY,Yy
22.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
23.
In this punnett square, which is the dominant trait?
The B stands for bud.
a)
purple flower bud
b)
white flower bud
c)
dominant
d)
recessive
24.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
25.

This type of inheritance pattern is a MIXTURE of two traits. This is known as ---

a)

incomplete dominance.

b)

codominance

26.

A condition in which both alleles for a gene are expressed so that both traits are visible is known as ---

a)

Codominance

b)

Incomplete dominance

27.

What type of inheritance do two alleles have if their traits blend together?

a)

Incomplete dominance

b)

Codominance

28.

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 gray?

a)

25

b)

50

c)

75

d)

100

29.
Determine the sex of the individual whose karyotype is displayed in the image.
a)
female
b)
male
30.
Determine the sex of the individual whose karyotype is displayed in the image.
a)
female
b)
male
31.
A pair of identical chromosomes shown in a karyotype, one inherited from mom, and one inherited from dad are called
a)
sister chromotids
b)
centromeres
c)
homologous chromosomes
d)
autosomes
32.
Nondisjunction can result in 
a)
trisomy conditions
b)
monosomy conditions
c)
additional sex chromosomes
d)
all of these
33.
When chromosomes fail to separate correctly during anaphase of meiosis, what can occur?
a)
extra chromosomes are found in the sex cell
b)
chromosomes of the sex cell are doubled
c)
chromosomes of the sex cell are halved
d)
meiosis never completes

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