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WorksheetsGenetics
Total questions: 71
Worksheet time: 45mins
Name
Class
Date
1.
This produces 2 identical cells.
a)
mitosis
b)
meiosis
2.
What is it called when a sperm and egg meet?
a)
meiosis
b)
fertilization
c)
cell division
d)
mitosis
3.
What phase is shown in the picture?
a)
anaphase 1
b)
anaphase 2
c)
metaphase 1
d)
telophase 1
4.
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
5.
What causes genetic variation in meiosis?
a)
chromosomes lining up
b)
crossing over of chromosomes
c)
separation of chromosomes
d)
chromosomes pulling apart
6.
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
7.
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
8.
Diploid Cells are represented by
a)
2n
b)
n
c)
4n
d)
1/2 n
9.
If the Diploid number of Carrots is 18, the haploid number is
a)
18
b)
9
c)
27
d)
36
10.
Which process and type of resulting cells are represented?
a)
mitosis, gametes
b)
mitosis, body cells
c)
meiosis, gametes
d)
meiosis, body cells
11.
If a somatic cell in a butterfly contains 24 chromosomes, a butterfly egg would contain
a)
3
b)
6
c)
12
d)
24
12.
The process of crossing over occurs in what phase of meiosis?
a)
anaphase 1
b)
prophase 1
c)
prophase 2
d)
telophase 1
13.
The chromosomes that pair up during meiosis, are called __________ chromosomes.
a)
homozygous
b)
asexual
c)
homologous
d)
genes
14.
When homologous chromosomes match up, they form a structure call a ___________.
a)
tetrad
b)
triad
c)
diploid
d)
gamete
15.
Crossing over helps promote
a)
male genotype
b)
genetic variation
c)
DNA replication
d)
mitosis
16.
A human zygote should have _____ chromosomes inside.
a)
46
b)
23
c)
92
d)
64
17.
How many daughter cells are produced at the end of meiosis?
a)
1
b)
2
c)
3
d)
4
18.
Which of the following is NOT a gamete (sex cell)?
a)
egg
b)
sperm
c)
skin cell
d)
all of the above are gametes
19.
What phase is represented?
a)
metaphase 1
b)
metaphase 2
c)
anaphase 1
d)
anaphase 2
20.
What phase is represented?
a)
metaphase 1
b)
metaphase 2
c)
anaphase 1
d)
anaphase 2
21.
Which of the following will only show if two alleles are present?
a)
a dominant trait
b)
heterozygous
c)
a recessive trait
d)
hybrid
22.
Identify the phase.
a)
Metaphase I
b)
Metaphase II
c)
Prophase I
d)
Anaphase II
23.
Name the growth phase of the cell cycle for both Mitosis and Meiosis.
a)
metaphase
b)
telophase
c)
interphase
d)
anaophase
24.
How many cells are produced during telophase I ?
a)
4
b)
8
c)
2
d)
0
25.
How many cells are produced during telophase I ?
a)
4
b)
8
c)
2
d)
0
26.
This image shows chromosomes during Prophase 1. Which of the following correctly describes the process shown?
a)
segregation of sister chromatids
b)
condensation and segregation of alleles
c)
mutationin which the DNA content of the gene is altered
d)
crossing - over in which alleles are exchanged
27.
How are your chromosomes inherited?
a)
most of your chromosomes from your mother
b)
most of your chromosomes from your father
c)
a random number of chromosomes from each parent
d)
half your chromosomes from your mother and half from your father.
28.
Name the phase of Mitosis:
a)
Prophase
b)
Metaphase
c)
Anaphase
d)
Telophase
29.
Letters for Male Chromosomes is ______, while females are _______
a)
XY, XX
b)
XX, XY
c)
YY,XX
30.
This happens when chromatids in chromosome 21 do not separate, so one of the sex cells gets an extra copy of chromosome 21.
a)
Down Syndrome
b)
Autism
c)
Cerebral Palsy
31.
Based only on the sex chromosomes in typical human egg and sperm cells at fertilization, the probability of producing a female is
a)
25%
b)
50%
c)
75%
d)
90%
32.
What phase does one cell begin to prepare to divide by having the nuclear membrane disappear and spindle fibers appear?
a)
Prophase I
b)
Prophase II
c)
Metaphase I
d)
Telophase II
33.
a)
Prophase I
b)
Prophase II
c)
Telophase I
d)
Telophase II
34.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
35.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
36.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
37.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
38.
aa always shows up as
a)
dominant
b)
recessive
39.
Aa is
a)
homozygous
b)
heterozygous
40.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
41.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
42.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
43.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
a)
rr
b)
R
c)
RR
d)
RR or Rr
44.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
45.
Which of the characteristics is a lion least likely to pass on to its offspring?
a)
fur color
b)
length of tail
c)
scars on leg
d)
body size
46.
T - tall and t = short
In the punnett square below, what belongs in the missing square
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
47.
Which choice best represents the genotype of this cross?
a)
1 Yy: 2 yy: 0 YY
b)
2 Yy: 2 yy: 0 YY
c)
3 Yy: 1 yy: 0 YY
d)
1 Yy: 3 yy: 0 YY
48.
What is the phenotype of the offspring? (A-Brown hair; a-blond hair)
a)
50 % Brown Hair and 50% Blond Hair
b)
25 % Brown Hair and 75% Blond Hair
c)
75 % Brown Hair and 25% Blond Hair
d)
0% Brown Hair and 100% Blond Hair
49.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
50.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
51.
Having two of the same genes for the trait (TT, tt); Both dominant or both recessive.
a)
homozygous or purebred
b)
heterozygous or hybrid
c)
twin offspring
d)
pairs of chromosomes
52.
Evan is a tall, 12 year old boy. He has a scar on his right cheek. He is intelligent and an excellent drummer. Which of his traits did he most likely inherit?
a)
height
b)
the scar
c)
his intelligence
d)
ability to play drums
53.
Where is DNA in a eukaryotic cell?
a)
Cytoplasm
b)
Cell membrane
c)
Nucleus
d)
Vacuole
54.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
55.
Who is considered the "father of genetics"?
a)
Gregor Mendel
b)
Reginald Punnett
c)
James Watson
d)
Justin Bieber
56.
In the second generation-how many people are carriers of the trait?
a)
2
b)
3
c)
5
d)
6
57.
What does this image represent?
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
58.
a)
Not Affected Male
b)
Not Affected Female
c)
Affected Male
d)
Affected Female
59.
Give the genotype for person III-3
a)
GG
b)
Gg
c)
gg
60.
If this pedigree shows a recessive disorder, what MUST the genotype of individual II-3 be?
a)
HH
b)
Hh
c)
hh
d)
None of the above
61.
What type of inheritance do two alleles have if their traits blend together?
a)
Incomplete Dominance
b)
Co-Dominance
62.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
63.
This is an example of ___________.
a)
Incomplete Dominance
b)
Codominance
64.
This is an example of ___________.
a)
Incomplete Dominance
b)
Codominance
65.
In some carnations, flower color exhibits codominance. Identify the correct genotypes for red, white, and speckled carnations.
a)
Red = RR, white = rr, speckled = Rr
b)
Red = RR, white = WW, speckled = rw
c)
Red = RR, white = ww, Speckled = Rw
d)
Red = RR, white = WW, speckled = RW
66.
Where the better adapted organisms survive to pass traits along to offspring.
a)
Evolution
b)
Natural Selection
c)
Extinction
d)
Artifical Selection
67.
What word describes a trait that helps an organism survive in its environment?
a)
natural selection
b)
mutation
c)
camouflage
d)
adaptation
68.
Which organisms are most likely to survive?
a)
the best adapted
b)
the fastest
c)
the strongest
d)
the most domesticated (tamed)
69.
These moths are all the same species. The differences between their wings is an example of ________________
a)
Natural Selection
b)
Variation
c)
Homeostasis
d)
Extinction
70.
Mutations are important because they bring about
a)
death of the organism in which they develop
b)
genetic variation needed for a population to evolve
c)
benefits for the individual, not for the population
d)
Hardey-Weinberg equilibrium within a population
71.
The more genetic variation a population has,
the more likely it is for some individuals to
a)
evolve
b)
migrate
c)
survive
d)
mutate
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