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WorksheetsGenetics
Total questions: 47
Worksheet time: 1hrs 3mins
Name
Class
Date
1.
Which of the following cell types is formed by meiosis?
a)
muscle cells
b)
skin cells
c)
sperm cells
d)
blood cells
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 thna from eggs
d)
offspring inherit a wider variety of genetic information
3.
What is a phenotype?
a)
The expression of a trait; what you see.
b)
refers to the genetic makeup of an individual
c)
An organism that has the same genes for a trait (ex. TT or tt)
d)
the passing of traits from parent to offspring
4.
The inherited combination of alleles is known as the offspring's
a)
heredity
b)
phenotype
c)
genotype
d)
redigree
5.
An organism's appearance is known as its
a)
heredity
b)
phenotype
c)
genotype
d)
pedigree
6.
Sex cells are produced through the process of
a)
mitosis
b)
cytokinesis
c)
binary fission
d)
meiosis
7.
What does heterozygous mean?
a)
An organism that has the same genes for a trait (TT or tt)
b)
An organism that has different genes for a trait (Tt)
c)
When neither gene is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
8.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
9.
A corn plant heterozygous for tall sprouts mates with a corn plant with short sprouts. If tall sprouts are dominant, how many different phenotypes are possible in the offspring?
a)
1
b)
2
c)
3
d)
4
10.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
11.
If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring?
a)
100% Tt
b)
50% Tt, 50% tt
c)
75%Tt, 25%tt
d)
25%TT, 50%Tt, 25%tt
12.
A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?
a)
25%
b)
50%
c)
75%
d)
100%
13.
A gene is
a)
a section of DNA
b)
a chemical found in the nucleus of cells
c)
contains instructions for building a protein
d)
all of the above
14.
During meiosis, one parent cell gives rise to how many daughter cells?
a)
1
b)
2
c)
3
d)
4
15.
Human gametes contain how many chromosomes?
a)
46
b)
23
c)
12
d)
28
16.
A single cross such as flower color.
a)
mono hybrid
b)
dihybrid
c)
crossing over
d)
homozygous
17.
What type of "square" helps us solve genetic problems?
a)
carpenter square
b)
Mendel square
c)
Punnett square
d)
genetic square
18.
TT,tt,PP,pp,SS,ss are examples of alleles that are?
a)
homozygous
b)
heterozygous
c)
different
d)
homologous
19.
The exact genetic makeup of an organism, such as RR, Tt, PP is its?
a)
phenotype
b)
dominance
c)
genotype
d)
trait
20.
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
21.
"The Great White Shark was 20 feet in length. Phenotype or Genotype?
a)
phenotype
b)
genotype
22.
Females-XX; MalesXY. A couple has 4 girls. What is the chance the next child will be a boy?
a)
75%
b)
100%
c)
25%
d)
50%
23.
If "T" is the allele for tall and "t" is the allele for short, then Tt would produce?
a)
tall
b)
short
c)
medium
d)
not enough info
24.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
25.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
26.
Term for an organism that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
linked genes
27.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
28.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
29.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
30.
W=white hair
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
a)
none
b)
3/4
c)
1/2
d)
all
31.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
32.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
33.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
34.
What gamete possibilities could come from this parent's genotype?
a)
AB, AB, aB, aB
b)
Ab, AB, Ab, ab
c)
Ab, Ab, Ab, Ab
d)
AB, aB, ab, aB
35.
What goes in box 3
a)
Aabb
b)
AABB
c)
AAbb
d)
aaBb
36.
Based off this punnett square, what fraction of the offspring will have wrinkled, yellow seeds?
a)
9/16
b)
3/16
c)
1/16
d)
16/16
37.
If this pedigree shows an autosomal recessive disorder, what MUST the genotype of individual II-3 be?
a)
HH
b)
Hh
c)
hh
d)
None of the above
38.
How are individuals III-2 and II-4 related?
a)
Cousins
b)
Dad and Daughter
c)
Uncle and Niece
d)
Grandpa and Granddaughter
39.
What type of heredity is shown in the pedigree?
(hint: check your notes - "modes of inheritance")
(hint: check your notes - "modes of inheritance")
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive
40.
What type of heredity is shown in the pedigree?
(hint: check your notes - "modes of inheritance")
(hint: check your notes - "modes of inheritance")
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive
41.
There are no carriers for Huntington's Disease- you either have it or you don't. Is Huntington's disease caused by a dominant or recessive trait?
a)
Dominant
b)
Recessive
42.
Huntington's Disease is a dominant trait.
What is the correct genotype for individual I-2?
What is the correct genotype for individual I-2?
a)
HH
b)
Hh
c)
hh
d)
H_
43.
Does this pedigree show a dominant or recessive trait?
a)
Dominant
b)
Recessive
44.
Hemophilia is a recessive sex-linked trait. If H = normal & h = has hemophilia, which genotype represents a male with hemophilia.
a)
XHY
b)
XHXh
c)
XhXh
d)
XhY
45.
What is the mode of inheritance shown here?
a)
Recessive because it "skips" a generation
b)
Dominant because it shows up in every generation
46.
In the second generation of this pedigree, how many people are carriers of the trait? *Remember: a carrier does not have the disorder/disease, but can pass it on to his/her children.
a)
1
b)
2
c)
3
d)
5
47.
On this pedigree, the allele for curly hair is dominant. The couple labeled 2 both have curly hair, but have a daughter who does not have curly hair. Therefore, we can tell from the chart that for the couple labeled 2 -
a)
the male is heterozygous and the female is heterozygous.
b)
the male is homozygous recessive and the female is homozygous dominant.
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