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Worksheetsfunny
Total questions: 52
Worksheet time: 33mins
Name
Class
Date
1.
Chiasmata are most closely related to which of the following?
a)
crossing over
b)
fertilization
c)
cytokinesis
d)
mitosis
2.
If a stem cell has 24 chromosomes, how many will it have at the end of meiosis?
a)
24
b)
12
c)
6
d)
the number varies per species
3.
When does crossing over occur?
a)
Interphase
b)
Prophase 1
c)
Prophase 2
d)
Metaphase 1
4.
Trisomy is a genetic disorder that ________
a)
has three sets of chromosomes
b)
has three copies of a particular chromosome
c)
that is curable
d)
none of the above
5.
Chiasmata are most closely related to which of the following?
a)
crossing over
b)
fertilization
c)
cytokinesis
d)
mitosis
6.
If a stem cell has 24 chromosomes, how many will it have at the end of meiosis?
a)
24
b)
12
c)
6
d)
the number varies per species
7.
Meiosis results in ______.
a)
4 genetically distinct haploid gametes
b)
2 genetically distinct cells
c)
2 genetically identical cells
d)
4 genetically identical cells
8.
What are alleles
a)
different forms of the same gene
b)
an alternate step of the cell cycle
c)
body cells
d)
another name for gametes
9.
The chromosomes that pair up during meiosis, are called __________ chromosomes.
a)
homozygous
b)
asexual
c)
homologous
d)
genes
10.
The purpose of meiosis is to form ________ cells.
a)
body
b)
sex
c)
somatic
d)
brain
11.
When homologous chromosomes match up, they form a structure call a ___________.
a)
tetrad
b)
triad
c)
diploid
d)
gamete
12.
Crossing over helps promote
a)
male genotype
b)
genetic variation
c)
DNA replication
d)
mitosis
13.
At fertilization the male and female sex cells will provide...
a)
Double of their chromosomes each
b)
One/third of their chromosomes each
c)
All of their chromosomes each
d)
Half of their chromosomes each
14.
What phase is shown in the picture?
a)
anaphase 1
b)
anaphase 2
c)
metaphase 1
d)
telophase 1
15.
The two ways to increase genetic variation during meiosis are crossing over and _____
a)
Synapsis
b)
Tetrad
c)
Independent assortment
d)
Gameiosis
16.
During meiosis I, what happens?
a)
Sister chromatids are split
b)
Homologous chromosomes are split
c)
Four cells are created
d)
None of the other choices are correct
17.
How many cells are created during Telophase II?
a)
1
b)
2
c)
3
d)
4
18.
Crossing over is important because....
a)
It prevents mutations from entering the gametes.
b)
It allows for even distribution of chromosomes in the gametes.
c)
It allows for more genetic diversity of gametes.
d)
It allows for genetic uniformity of gametes.
19.
What stage of meiosis is this?
a)
Anaphase II
b)
Anaphase I
c)
Metaphase I
d)
Prophase II
20.
What stage of meiosis is this?
a)
Anaphase II
b)
Anaphase I
c)
Telophase II
d)
Prophase II
21.
What stage of meiosis is this?
a)
Anaphase II
b)
Anaphase I
c)
Telophase II
d)
Prophase II
22.
What stage of meiosis is this?
a)
Anaphase II
b)
Anaphase I
c)
Telophase II
d)
Metaphase II
23.
What stage of meiosis is this?
a)
Anaphase II
b)
Anaphase I
c)
Telophase II
d)
Metaphase II
24.
The cells produced via meiosis are called:
a)
sex cells
b)
somatic cells
c)
body cells
d)
skin cells
25.
What is it called when a sperm and egg meet?
a)
meiosis
b)
fertilization
c)
cell division
d)
mitosis
26.
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
27.
What causes genetic variation in meiosis?
a)
chromosomes lining up
b)
crossing over of chromosomes
c)
separation of chromosomes
d)
chromosomes pulling apart
28.
Unlike mitosis, meiosis in male mammals results in the formation of
a)
one haploid gamete
b)
three diploid gametes
c)
four diploid gametes
d)
four haploid gametes
29.
When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _________________ occurs
a)
crossing over
b)
mutagenesis
c)
hybridization
d)
fertilization
30.
What kind of cells are made in MEIOSIS?
a)
Haploid Gametes
b)
Diploid Somatic Cells
c)
Skin Cells
d)
Liver Cells
31.
Goes through P.M.A.T two rounds
a)
Mitosis
b)
Meiosis
c)
Osmosis
d)
Transcription
32.
Which of these cells would be produced through meiosis?
a)
skin cells
b)
liver cells
c)
brain cells
d)
sperm cells
33.
What is another reason we need meiosis?
a)
So the offspring has genes from both parents
b)
So the offspring has genes from one parent
c)
So the offspring has genes from neither parents
d)
So the offspring makes its own genes
34.
Which is the best description of the events that take place in anaphase II?
a)
Homologous chromosome line up along the equator.
b)
Sister chromatids are separated and pulled to opposite sides of the cell.
c)
Homologous pairs are separated and pulled to opposite sides of the cell.
d)
The replicated chromosomes become visible.
35.
In chickens, rose comb (R) is dominant to single comb(r). Homozygous rose-combed roosters were mated with single-combed hens. All the chicks in the F1 generation are kept together as a group for several years. They were all allowed to mate only within their own group. What is the expected phenotype of the F2 chicks?
a)
75% rose comb and 25% single comb
b)
50% rose comb and 50% single comb
c)
100% rose comb
d)
100% single comb
36.
The typical human body cell contains 46 chromosomes. How many chromosomes are found in the average human sperm?
a)
46
b)
45
c)
92
d)
23
37.
The principle of dominance states that
a)
some alleles are dominant and others are recessive.
b)
alleles are neither dominant nor recessive.
c)
all alleles are recessive.
d)
all alleles are dominant.
38.
A Punnett square shows all of the following except
a)
the alleles in the gametes of each parent.
b)
the actual results of a genetic cross.
c)
all possible results of a genetic cross.
d)
the genotypes of the offspring.
39.
People with down syndrome have how many chromosomes?
a)
45
b)
46
c)
47
d)
48
40.
Trisomy is an example of:
a)
nondisjunction
b)
deletion
c)
inversion
d)
translocation
41.
Trisomy is an example of:
a)
nondisjunction
b)
deletion
c)
inversion
d)
translocation
42.
The X and Y are called the:
a)
autosomes
b)
extra chromosomes
c)
sex cells
d)
sex chromosomes
43.
In human gametes they contain:
a)
22 autosomes, 1 sex chromosome
b)
45 autosomes, 1 sex chromosome
c)
1 autosome, 22 sex chromosomes
d)
1 autosome, 45 sex chromosomes
44.
Normal human males develop from fertilized eggs containing which of the following sex chromosomes?
a)
XX
b)
XY
c)
XO
d)
XXY
45.
Phase of meiosis when homologous pairs of chromosomes line up along the equator:
a)
anaphase 1
b)
anaphase2
c)
metaphase 1
d)
metaphase 2
46.
Small cell with very little cytoplasm formed during oogenesis:
a)
ovum
b)
haploid cell
c)
polar body
d)
zygote
47.
chromosomal disorder where the arm of #5 is broken and results in an abnormal larynx
a)
william's syndrome
b)
edward's syndrome
c)
down syndrome
d)
crit du chat
48.
chromosomal disorder where an individual has only one X sex chromosome:
a)
Turner syndrome
b)
Down Syndrome
c)
Fragile X syndrome
d)
Williams syndrome
49.
chromosomal disorder where an individual is born with 2 X chromosomes and 1 Y:
a)
Down Syndrome
b)
Klinefelter's syndrome
c)
Turner Syndrome
d)
William's syndrome
50.
When homologous pairs condense and pair up this is called:
a)
fertilization
b)
crossing over
c)
synapsis
d)
budding
51.
Which is the number of chromosomes in a haploid cell?
a)
2n
b)
n
c)
3n
d)
4n
52.
The first 22 pairs of chromosomes not involved with gender are called:
a)
haploid cells
b)
gametes
c)
autosomes
d)
somatic chromosomes
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