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WorksheetsT3.2 Genetics Review
Total questions: 40
Worksheet time: 3hrs 14mins
Name
Class
Date
1.
One of the two forms of a gene is called....
a)
a genotype
b)
an allele
c)
a hybrid
d)
a trait
2.
The genetic make up of this flower is....
a)
homozygous recessive
b)
heterozygous
c)
homozygous dominant
d)
white
3.
If Albinism (to be an Albino) is a recessive trait represented by (a), what is the percentage of offspring will be Albino?
a)
25%
b)
50%
c)
75%
d)
100%
4.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
5.
To express the recessive trait you must be....
a)
homozygous dominant
b)
heterozygous
c)
heterozygous recessive
d)
homozygous recessive
6.
Brown is dominant to green. What is the probability of these parents having green offspring?
a)
25%
b)
50%
c)
75%
d)
100%
7.
An organism's _______ describes its genetic composition. An organism's _______ describes its appearance or observable characteristics.
a)
phenotype; genotype
b)
species; heredity
c)
heredity; species
d)
genotype; phenotype
8.
Some characteristics are described as polygenic. What does polygenic mean?
a)
When one characteristic is controlled by more than one gene
b)
When one gene controls more than one trait
c)
When many genes control many traits
d)
When an organism has lots of genes
9.
These chromosomes are homologous. What does that mean?
a)
They have the same genes in the same location
b)
They have exactly the same genetic information
c)
They have different genes to each other
d)
They are chromosomes which randomly paired up with each other
10.
Incomplete dominance or co-dominance?
A calico cat shows both the traits for orange fur and black fur.
A calico cat shows both the traits for orange fur and black fur.
a)
Incomplete Dominance
b)
Co-dominance
c)
Complete dominance
d)
Mendelian dominance
11.
A roan cow shows co-dominance in fur color (orange & white). What is the phenotype ratio expected if a roan cow and a roan steer mate together?
a)
4: Orange and White
b)
1: Orange : 1 White
c)
2 Orange: 2 Orange and White: 0 White
d)
1: Orange: 2 Orange and White: 1 White
12.
Normal red blood cells (rbc's) are bi-concave disks; sickle cells are abnormal. An individual can have both normal and sickle cells. What type of trait describes rbc shape?
a)
Incomplete dominance
b)
Co-dominance
c)
Mendelian dominance
d)
Complete dominance
13.
Ken is blood type B and Sally is blood type A. How can they have children who are types AB, and O?
a)
Alleles A and B are co-dominant, but allele O is recessive
b)
Alleles A and B are incompletely dominant, but allele O is recessive
c)
Alleles A and B are co-dominant, but allele O is completely dominant
d)
Alleles A and B are incompletely dominant, but allele O is completely dominant
14.
Ken is blood type B and Sally is blood type A. How can they have children who are types A, B, AB, and O?
a)
Ken: IBIO
Sally: IAIO
Sally: IAIO
b)
Ken: IBIB
Sally IAIO
Sally IAIO
c)
Ken: IBIO
Sally: IAIA
Sally: IAIA
d)
Ken: IBIB
Sally: IAIA
Sally: IAIA
15.
When different traits are crossed and both are expressed in an organism, this is .....
a)
Co-Dominance
b)
Gene expression
c)
Intermediate Inheritance
d)
Incomplete Dominance
16.
Orange or black fur is a single, X-linked co-dominant trait in cats. Calico cats have white fur with patches of orange and black. Is it true that calico cats can only be female?
a)
Yes, because they have 2 'X' chromosomes, and therefore can have both the orange and black alleles (XOXB)
b)
No, males can be calico because they can have both the alleles for orange and black (XOYB)
c)
Yes because the trait is found on the X chromosome (XOBX)
d)
No, males can be calico because the trait is found on the X chromosome (XOBY)
17.
What percentage of the offspring will have this recessive disease?
a)
0%
b)
25%
c)
50%
d)
75%
18.
What is NOT a possible genotype for someone with type B blood?
a)
IBIB
b)
IAIB
c)
IB IO
d)
IOIB
19.
Valentines Day was close and Frank the Florist wanted to grow exclusively purple carnations. When he crosses a homozygous red carnation with a homozygous blue carnation, he gets purple carnations - yay! This is an example of.....
a)
co-dominance
b)
incomplete dominance
c)
a Mendelian trait
d)
pure luck
20.
Colorblindness is a recessive X-linked disorder.
Which genotype represents a male with normal vision?
Which genotype represents a male with normal vision?
a)
XNYN
b)
XnYn
c)
XNY
d)
XnY
21.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XbY
d)
XBY
22.
In fruit flies, red eye color (R) is a sex-linked trait that is dominant over white eye color (r). According to the Punnett square, what percentage of FEMALE OFFSPRINT will have white eyes?
a)
0%
b)
25%
c)
50%
d)
100%
23.
Hemophilia is a recessive X-linked disorder. According to the Punnett square, which is NOT true?
a)
50% of all offspring will have the disorder
b)
50% of male offspring will not have the disorder
c)
25% of female offsprings will have the disorder
d)
the mother does not have the disorder but is a carrier
24.
Jayne has dimples and freckles, she is heterozygous for both of these Mendelian traits. Her genotype is DdFf. What are the possible combinations of her gamets?
a)
Dd, Ff, DF, df
b)
DF, Df, dF, df
c)
Dd, Ff, DF, df
d)
DdFf
25.
In the following dihybrid cross, a short tail (S) is dominant to a long tail (s), and brown fur (B) is dominant to white fur (b). What is the fraction of cats that have a short tail and white fur?
a)
4/16
b)
12/16
c)
3/16
d)
1/16
26.
What genotype is missing from this Punnett Square?
a)
RrYy
b)
RRYY
c)
rryy
d)
RrYY
27.
A male beetle has the genotype Ttbb. If this beetle mates with a female with genotype TTBb, what is the chance their offspring will have the genotype TtBb?
a)
3/16
b)
4/16
c)
8/16
d)
12/16
28.
Assume dad's gametes are on top of the Punnett square, what is his genotype?
a)
AAPP
b)
AaPp
c)
aaPP
d)
Aapp
29.
What is the missing genotype?
a)
BBee
b)
BBEe
c)
BbEe
d)
bbee
30.
What is the symbol for an Affected Male (a male with the condition)?
a)
Half Circle
b)
Half Square
c)
Full Shaded Circle
d)
Full Shaded Square
31.
What does the individual located at Generation II - 3 represent?
a)
Dominant Female
b)
Recessive Female
c)
Carrier Female
d)
Heterozygous Female
32.
What kind of trait is colorblindness if females can be carriers without having the disease?
a)
Regular trait
b)
Sex-linked trait
c)
Co-dominant
d)
Incomplete dominant
33.
Which gender can be carriers of colorblindness and not have it?
a)
Just males
b)
Just females
c)
Both genders
d)
Neither gender is a carrier
34.
Why do all the daughters in Generation II carry the colorblind gene?
a)
Because mom passed on the affected gene.
b)
Because dad passed on the affected X chromosome.
c)
Because their brother has it.
d)
Because their brother gave it to them.
35.
There are no carriers for Huntington's Disease - you either have it or you don't. Is Huntington's disease is a....
a)
a dominant trait
b)
a recessive trait
c)
a co-dominant trait
d)
an incompletely dominant trait
36.
Wet earwax is a dominant trait (E), dry earwax is recessive trait (e). What is the sex, phenotype, and genotype of individual III-1?
a)
female, wet earwax, Ee
b)
female, dry earwax, ee
c)
female, wet earwax EE
d)
female, wet earwax, cannot tell genotype
37.
Give the genotype for person III-2, for this autosomal trait.
a)
FF
b)
Ff
c)
ff
d)
we cannot be 100% sure of the genotype
38.
If hemophilia is a sex-linked recessive trait, what genotype would individual III-3 have?
a)
XhX
b)
XhXh
c)
XhYh
d)
XhY
39.
What is the mode of inheritance shown here?
a)
Autosomal Dominant
b)
Autosomal Recessive
c)
Sex Linked Recessive
d)
Co-dominant
40.
What is the genetic sex of this individual?
a)
Male
b)
Female
c)
Can't tell
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