NEW
Font size
S
M
L
XL
WorksheetsChromosomes
Total questions: 18
Worksheet time: 13mins
Name
Class
Date
1.
Histones are
a)
proteins wound up in DNA
b)
critical to maintaining the shape of chromosomes
c)
aid in the tight packing of DNA
d)
all of these
2.
When DNA is in its less coiled, "relaxed," state, between cell divisions, it is called
a)
autosomes
b)
chromatid
c)
chromatin
d)
centromere
3.
Autosomes are
a)
chromosomes found in autotrophs, only
b)
chromosomes that automatically correct all errors in the DNA
c)
chromosomes that determine traits other than sex
d)
chromosomes that determine the sex of the individual
4.
The structure that holds two chromosomes together until they separate for cell division is the
a)
chromatid
b)
chromatin
c)
centromere
d)
cytoplasm
5.
The structures labeled B are
a)
centrioles
b)
chromatids
c)
centromeres
d)
chromopheres
6.
The structure labeled A is a(n)
a)
chromatid
b)
centriole
c)
centromere
d)
chromophere
7.
Chromosomes that have the same sequence of genes and the same structure are ___________.
a)
homologous chromosomes
b)
alleles
c)
phenotypes
d)
genotypes
8.
Which of the following statements about homologous chromosomes is correct?
a)
Each gene is at the same locus on both chromosomes.
b)
They are two identical copies of a parent chromosome which are attached to one another at the centromere.
c)
They come from the same parent.
d)
They are chromosomes that have identical genes and alleles.
9.
How many autosomes are there in a human sperm?
a)
1
b)
22
c)
23
d)
46
10.
Based on the Karyotype shown, at which chromosome pair can we identify a genetic disorder?
a)
Chromosome pair 5
b)
sex chromosomes
c)
Chromosome pair 21
d)
There are no chromosomal disorders
11.
Which statement is NOT true about Karyotypes
a)
Chromosomes (pairs 1-22) are arranged by size
b)
Sex chromosomes are found at the end
c)
A normal karyotype has 46 chromosomes or 23 pairs
d)
Having missing or extra chromosomes does not indicate a disorder
12.
An abnormality in which homologous chromosomes fail to separate properly is called
a)
glue syndrome
b)
sticky-osis
c)
nondisjunction
d)
telophase
13.
A nondisjunction resulting in three chromosomes in one position is called
a)
monosomy
b)
disomy
c)
trisomy
d)
polysomy
14.
A nondisjunction resulting in one chromosome in one position is called
a)
monosomy
b)
disomy
c)
trisomy
d)
polysomy
15.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be what?
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
16.
The position of a gene on a chromosomes is the _______.
a)
allele
b)
gene locus
17.
What is a nucleosome?
a)
All the DNA and histones in a cell
b)
chromatin that has been condensed
c)
a histone with two coils of DNA wrapped around it
18.
Genes that are located on the same chromosome
a)
human genome project
b)
pedigree
c)
biology
d)
linked genes
Reset
