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Chromosomal mutation

Total questions: 15

Worksheet time: 10mins

Name
Class
Date
1.

How many chromosomes does a person with trisomy 21 have?

a)

46

b)

22

c)

47

d)

23

2.
A normal human has ___ pairs of autosomes and ___ pair(s) of sex chromosomes.
a)
23,1
b)
22,1
c)
1, 22
d)
1, 23
3.

Nondisjunction

a)

When a segment of a chromosome breaks off.

b)

When a segment of a chromosome breaks off, flips, and reattaches.

c)

When a segment of a chromosome is copied or doubles.

d)

When a segment of a chromosome breaks and attaches to a non homologous chromosome.

e)

When entire chromosomes don't separate evenly during meiosis.

4.

The chromosomal mutation shown in the image is a

a)

deletion

b)

duplication

c)

inversion

d)

translocation

5.

A piece of the chromosome detches, turns 180 degrees, and reattaches

a)

deletion

b)

duplication

c)

inversion

d)

translocation

6.

The failure of one or more pairs of homologous chromosomes or sister chromatids to separate "normally" during meiosis is called _____________________.

a)

nondisjunction

b)

duplication

c)

deletion

d)

translocation

7.

What is translocation in terms of chromosomal mutations?

a)

A chromosome segment is removed.

b)

Two chromosomes exchange segments.

c)

A chromosome segment is repeated.

d)

An entire chromosome is duplicated.

8.

Which chromosomal mutation involves the reversal of a chromosome segment?

a)

Deletion

b)

Inversion

c)

Duplication

d)

Translocation

9.

What is a chromosomal mutation?

a)

A mutation that affects a single gene.

b)

A mutation that alters the structure or number of chromosomes.

c)

A mutation caused by exposure to radiation.

d)

A mutation that occurs only in gametes.

10.
The following karyotype illustrates an example of which syndrome?
a)
Turner's Syndrome
b)
Klienfelter's Syndrome
c)
Edward's Syndrome
d)
Down Syndrome
11.
A chromosome is found to be shorter than it's homologous match.  Which type of mutation would this most likely be?
a)
insertion
b)
deletion
c)
translocation
d)
inversion
12.
Notice the abnormal 23rd chromosome.  This individual suffers from which chromosomal genetic disorder?
a)
Klienfelter's Syndrome
b)
Down Syndrome
c)
Cris-du-Chat Syndrome
d)
Andrew's Syndrome
13.
An example of a mutation where a piece of chromosome breaks off and attaches to another chromosome is called ___.
a)
trisomy
b)
translocation
c)
inversion
d)
deletion
14.

Which one is not chromosomal aberration

a)

Deletion

b)

Duplication

c)

Insertion

d)

Translocation

15.

Which of the following genotypes causes Klinefelter syndrome?

a)

XO

b)

XX

c)

XXY

d)

XYY