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Genetics Unit Review Standard

Total questions: 41

Worksheet time: 48mins

Name
Class
Date
1.
Aa, DD, yy are all examples of
a)
genotypes
b)
phenotypes
2.

In simple genetics, AA and Aa always show up as

a)

the dominant phenotype

b)

the recessive phenotype

3.
Which of the following genotypes is homozygous dominant?
a)
short
b)
Aa
c)
AA
d)
tall
4.
B = brown fur  b = white fur
In the punnett square, what is the probability for white fur? 
a)
0%
b)
25%
c)
50%
d)
75%
5.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
6.
In a heterozygous genotype, the ___________ allele is what is visible in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
7.

What you see, or the physical appearance is called the

a)

Genotype

b)

Phenotype

c)

Homozygous

d)

Heterozygous

8.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
9.
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)
10.
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%
11.
This type of inheritance pattern shows a blending of both alleles?
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
12.
Mrs. Jones has heterozygous type A blood.
Mr. Jones has blood type AB.
What percent of offspring will have A blood?
a)
100% 
b)
75%
c)
50%
d)
25%
13.
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
14.
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%
15.
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
16.
G = green, g = yellow
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
17.
How many alleles make up one gene?
a)
1
b)
2
c)
3
d)
4
18.
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.
19.
How many females are in this pedigree?
a)
3
b)
4
c)
6
d)
7
20.

All of the following are recessive diseases except

a)

cystic fibrosis

b)

colorblindness

c)

PKU

d)

hemophilia

e)

Huntington's

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.

Which of the following is an example of the environment effecting a gene?

a)

getting skin cancer from too many sunburns

b)

having sickle cell anemia

c)

being born with diabetes

23.
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
24.

What would be the genotype for someone who has Type O blood?

a)

AO

b)

BO

c)

OO

d)

XHY

25.
R  = red and W = white. 
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
26.

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? (make Punnett square)

a)

0%

b)

25%

c)

50%

d)

75%

27.

In plants, tall (T) is dominant to short (t). Two heterozygous parents mate. What is the probability of producing a short plant? (make Punnett square)

a)

0%

b)

25%

c)

50%

d)

75%

28.
Which type of trait is shown in the pedigree?
a)
recessive
b)
sex-linked
c)
dominant 
29.

All of the following are true about genetic diseases except

a)

they are inherited through gametes

b)

cystic fibrosis creates excess mucus in the lungs and digestive tract

c)

sickle cell creates mis-shaped blood cells

d)

Huntington's must eat a vegetarian diet and get injections to remain healthy

30.
Which individual in generation III is a carrier female?
a)
1
b)
2
c)
3
d)
4
31.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
32.
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.
33.

What is a possible genotype for someone with type B blood?

a)

AB

b)

OO

c)

AA and AO

d)

BB and BO

34.
Which term(s) best describes the inheritance of human blood types? 
a)
sinple genetics 
b)
codominance 
c)
multiple alleles
d)
incomplete dominance 
35.
Which genetic abnormality is shown in this karyotype?
a)
Partial Addition
b)
Partial Deletion
c)
Down's syndrome
d)
Monosomy of sex chromosome
36.
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
37.
What is the sex of this baby in this karyotype?
a)
Male
b)
Female
38.
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.
39.
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
40.

The law of segregation states that in meiosis, the 2 alleles for each gene must ________ in the gamete.

a)

stay together

b)

separate

41.

Two carriers of sickle cell are expecting a child. What percent chance do they have of giving birth to a child with the disease? (make Punnett square)

a)

0%

b)

25%

c)

50%

d)

75%

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