WorksheetsGenetics Unit Test Review
Total questions: 48
Worksheet time: 1hrs 8mins
Name
Class
Date
1.
In a flowering plant species, red is considered dominant. Though, when red flower plant mates with white flower plant, the offspring are pink. What is the phenotype of two pink plants mating?
a)
75% red, 25% white
b)
50% red, 50% white
c)
25% red, 25% white, 50% pink
d)
100% red
2.
Aa, DD, yy are all examples of
a)
genotypes
b)
phenotypes
3.
In simple genetics, AA and Aa always show up as
a)
dominant
b)
recessive
4.
Which of the following genotypes is homozygous dominant?
a)
short
b)
Aa
c)
AA
d)
tall
5.
B = brown fur b = white fur
In the punnett square, what is the probability for white fur?
In the punnett square, what is the probability for white fur?
a)
0%
b)
25%
c)
50%
d)
75%
6.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
7.
In a heterozygous genotype, the ___________ allele is what is visible in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
8.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
9.
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
10.
A complex molecule that carries genetic information that that codes for the production of proteins. Each protein is expressed as a trait. Example: blonde hair.
a)
DNA
b)
protein
c)
RNA
d)
glucose nucleic acid (GNA)
11.
In plants, tall (T) is dominant to short (t). Two heterozygous parents mate. What is the probability of producing a short plant?
a)
0%
b)
25%
c)
50%
d)
75%
12.
Black fur (B) is dominant to tan fur (b). Find the probability of a tan offspring when a homozygote black fur mouse is mated with a tan furred mouse?
a)
0%
b)
25%
c)
50%
d)
100%
13.
Curly hair is dominant over straight hair, but the heterozygote has wavy hair.
What percent of offspring will have curly hair when a curly-haired parent is expecting a child with a wavy hair?
What percent of offspring will have curly hair when a curly-haired parent is expecting a child with a wavy hair?
a)
25%
b)
50%
c)
75%
d)
100%
14.
Mrs. Jones has heterozygous type A blood.
Mr. Jones has blood type AB.
What percent of offspring will have A blood?
Mr. Jones has blood type AB.
What percent of offspring will have A blood?
a)
100%
b)
75%
c)
50%
d)
25%
15.
Which describes the type of cross shown in the picture?
a)
codominance: the heterozygote shows a blending
b)
incomplete dominance: both homozygous alleles become a mixture for the heterozygous
c)
sex-linked: each box is worth 50%
d)
Nondisjunction: chromosomes separate incorrectly
16.
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%
17.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
18.
How many alleles make up one gene?
a)
1
b)
2
c)
3
d)
4
19.
Red flower (R) color is dominant to white flower (R') color in rose plants. What are the expected phenotypic results of a cross when a heterozygous rose plant is mated with a white rose plant??
a)
75% white flowers, 25% red flowers
b)
50% white flowers, 50% red flowers
c)
100% red flowers
d)
100% white flowers
20.
How is it possible for an offspring show a trait that is not displayed in either of its parents?
a)
When both parents are homozygous recessive and showing the recessive trait, their offspring will get the dominant gene. This will allow the offspring to show the dominant trait.
b)
The genes have been modified from parent to offspring
c)
When both parents are heterozygous and showing the dominant trait, it is possible for both parents to pass on the recessive gene to their offspring. This will allow the offspring to show the recessive trait.
21.
Which gene combination(s) would result in someone having sickle cell disease?
a)
AA
b)
aa
c)
Aa
d)
both AA and aa
22.
Look at the Punnett Square. What's the probability of having the recessive offspring?
a)
100%
b)
75%
c)
50%
d)
25%
23.
Red/green color blindness is a recessive sex-linked trait. A woman who is a carrier (XRXr) for this allele marries a normal-vision male (XRY). What is the probability that they will have a daughter who is color blind?
a)
0%
b)
50%
c)
75%
d)
100%
24.
Hemophilia is a recessive sex-linked disease. A carrier female is expecting a baby with a hemophiliac male. What percent chance do they have of having a son with the disease?
a)
25%
b)
50%
c)
75%
d)
100%
25.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
c)
Independent assortment
d)
Recessive inheritance
26.
In the punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
27.
What would be the genotype for someone who has Type O blood?
a)
AO
b)
BO
c)
OO
28.
Eye color, skin color, and hair color are examples of traits that are controlled by...
a)
dominant/recessive traits
b)
polygenic inheritance
c)
mulitple alleles
d)
codomiance
29.
R = red and W = white.
In the RW genotype is both red and white.
What pattern of inheritance is being shown?
In the RW genotype is both red and white.
What pattern of inheritance is being shown?
a)
simple genetics
b)
codomimance
c)
multiple alleles
d)
polygenic inheritance
30.
Hemophilia is a sex-linked recessive trait. Perform a cross between a normal male and a hemophiliac mother. What is the probability of the male offspring having hemophilia?
a)
0%
b)
50%
c)
100%
d)
75%
31.
Huntington's disease is an autosomal dominant trait. Parent 1 has a heterozygous, genotype and parent 2 does not have the disease. What is the probability that their offspring will inherit the disease?
a)
0%
b)
25%
c)
50%
d)
75%
32.
A blue flowering plant (BB) mates with a red flowering plant (RR). What percent of offspring will be purple (blended color)?
a)
100%
b)
75%
c)
50%
d)
0%
33.
Colorblindness is a sex-linked recessive trait. What percent is each box worth in a sex-linked Punnett square?
a)
50%
b)
25%
34.
Which type of trait is shown in the pedigree?
a)
recessive
b)
sex-linked
c)
dominant;
35.
Which individual in generation III is a carrier female?
a)
1
b)
2
c)
3
d)
4
36.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
37.
What is the difference between codominance and incomplete dominance
a)
There is no difference
b)
incomplete dominance uses X's
c)
You can see both phenotypes in codominance
d)
There is only one phenotype regardless of genotype.
38.
In cats, coat color shows codominance. A calico (black & orange) cat mates with an orange cat. What is the genotype of the calico parent?
a)
BB
b)
BO
c)
OO
39.
This type of inheritance pattern shows a blending of both alleles?
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
40.
What is a possible genotype for someone with type B blood?
a)
AB
b)
OO
c)
AA and AO
d)
BB and BO
41.
Which term(s) best describes the inheritance of human blood types?
a)
sinple genetics
b)
codominance
c)
multiple alleles
d)
incomplete dominance
42.
A man with type O blood is accused of being the father of a type AB baby. The mother is type A. Could this man be the father?
a)
Yes
b)
No
43.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
44.
Which genetic abnormality is shown in this karyotype?
a)
Partial Addition
b)
Partial Deletion
c)
Down's syndrome
d)
Monosomy of sex chromosome
45.
Which is the correct sequence?
a)
mitosis - gametes - zygote - meiosis - fertilization - embryo
b)
Fertilization-mitosis-zygote-gametes-meiosis-embryo
c)
meiosis-zygote-gametes-mitosis-fertilization-embryo
d)
meiosis-gametes-fertilization-zygote-mitosis-embryo
46.
What is the sex of this baby in this karyotype?
a)
Male
b)
Female
47.
Which of the following is an example of a polyenic trait?
a)
eye color
b)
skin tone
c)
height
d)
all of the above are polygenic traits.
48.
Which of the following is an example of the environment effecting the phenotype of a gene?
a)
genes carried on the "X" or "Y" chromosome
b)
Jane is 5 foot tall and Marquan is 6 foot tall
c)
lizard eggs kept at 105⁰F will be females
100 %
