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CC Genetics Review

Total questions: 77

Worksheet time: 3hrs 50mins

Name
Class
Date
1.
What is a phenotype?
a)
The expression of a trait; physical appearance.
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
2.

What does heterozygous mean?

a)

An organism that has the same alleles for a trait (TT or tt)

b)

An organism that has different alleles for a trait (Tt)

c)

When neither allele is fully dominant; offspring is a mixture of both

d)

the different forms of a trait (hair color--> brown, blonde, red)

3.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
4.
Two heterozygous (Tt)tall pea plants are crossed. Which describes their offspring?
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
5.
R=round seed
r=wrinkled seed.
Cross a homozygous round with a wrinkled. Which statement predicts the results?
a)
offspring will be Rr
b)
offspring will be RR
c)
round seeds will be recessive to wrinkled
d)
Wrinkled will be observed in half of offspring
6.

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?

a)

0

b)

3/4

c)

1/2

d)

1

7.
Pea plants can have green or yellow seeds. In a pea plant that is heterozygous for seed color, the allele for yellow seeds masks the effects of the allele of green seeds. Which of the following terms best describes the allele for yellow seeds?
a)
codominant
b)
recessive
c)
dominant
d)
sex-linked
8.
Which of the following alleles is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
9.
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%
10.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
11.
Colorblindness is a recessive, X chromosome sex-link disorder. Cross the parents to figure out which percentage of their offspring will be colorblind.
a)
25%
b)
0%
c)
75%
d)
50%
12.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
13.
What type of chromosomal abnormality do people with Down Syndrome have? 
a)
trisomy 21
b)
monosomy 21
c)
recessive inheritance
d)
dominant inheritance
14.
In fruit flies eye color is carried on the X chromosome. RED is dominant to WHITE. What is the sex and color of the following: XrY
a)
female red
b)
female white
c)
male red
d)
male white
15.

In fruit flies eye color is carried on the X chromosome. RED is dominant to WHITE. What is the sex and color of the following: XRXr

a)

female red

b)

female white

c)

male red

d)

male white

16.
In humans, skin tone is caused by 3 genes, each with 2 alleles.  This is an example of
a)
codominance
b)
incomplete dominance
c)
polygenic inheritance
d)
multiple alleles
17.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
18.
What law states that in Tt the person will only show the dominant allele
a)
law of segregation
b)
law of independent assortment
c)
law of dominance
d)
law of punnett squares
19.

Squidward has light blue skin, and his genotype for this trait is Bb. Which of the following would describe Squidward?

a)

Purebred

b)

Hybrid

c)

Homozygous

d)

Sex-linked

20.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
21.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
22.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
23.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
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.
Magda is a tall, 11 year old drummer. She has a scar on her right cheek. She is good at swimming. Which of her traits did Magda most likely inherit?
a)
height
b)
the scar
c)
ability to swim
d)
ability to play drums
27.
1. A student has sickle cell, a homozygous recessive gene. What could be her parent’s genotypes?
a)
Her father is heterozygous; mother is homozygous recessive.
b)
Her father is homozygous dominant; mother is homo dominant.
c)
Her father is homozygous dominant; mother is homo recessive.
28.
Parents withType B & Type O blood have a child.Which is a possible genotype of the offspring?
a)
ii
b)
IBIB
c)
IAIB
d)
IAIA
29.

2 carriers for sickle cell have a child. What's the probability their child will have sickle cell?

a)

25%

b)

50%

c)

75%

d)

100%

30.
The punnet square below is an example of which of the following inheritance patterns?
a)
Incomplete Dominance
b)
Codominance
c)
Sex-Linked
31.
7. If 2 pink (RW) offspring reproduce, what percentage of red flowers will be produced?
a)
25%
b)
0%
c)
50%
d)
100%
32.
Colorblindness is sex-linked recessive.Colorblind male & carrier female mate, what will result?
a)
50% colorblind offspring
b)
25% colorblind offspring
c)
100% colorblind offspring
d)
No colorblind offspring
33.
Short wings are Sex-linked, recessive. What are the results if a Short-winged female mates w/ long-winged male,
a)
All females long-winged, all males short-winged
b)
All females short-winged, all males long-winged.
c)
Half of the males & females short-winged, half long-winged.
d)
All offspring will be short-winged.
34.
This is a pedigree for a sex-linked, recessive disease. What is genotype of Person 1?
a)
XBXB
b)
XBY
c)
XbXb
d)
XbY
35.
What is the genotype of a female carrier of a sex-linked disorder?
a)
XHY
b)
XHXH
c)
XhY
d)
XHXh
36.
The pedigree is for a sex-linked recessive disease. What is the genotype of person 13?
a)
XBY
b)
XbXb
c)
XbY
d)
XBXb
37.
Hitchhiker's thumb is a dominant trait. Heterozygous male & female w/o hitchhiker have child:
a)
0% Hh and 100% hh
b)
100% Hh and 0% hh
c)
75% Hh and 25% hh
d)
50% Hh and 50% hh
38.
Which set of parents can most likely produce a child with type O blood?
a)
one parent w/ type AB blood, and parent with type A blood
b)
parent w/homozygous typeA blood, parent w/ homozygous typeB
c)
parent w/ heterozygous type A blood, parent w/ typeO blood
d)
one parent w/ type AB blood, the other parent w/type O blood
39.
Which genetic abnormality can be identified through karyotyping?
a)
Point Mutation
b)
Extra Chromosome
c)
Recessive Allele
d)
Sex-Linked Disorder
40.
What is shown in the karyotype below?
a)
Male with Down syndrome
b)
Normal Male
c)
Female with Down syndrome
d)
Normal Female
41.
Which answer best describes codominant alleles?
a)
Both are equally dominant
b)
Both are equally recessive
c)
Neither are dominant or recessive
42.
One form of a gene is called_______________
a)
a DNA
b)
a Phenotype
c)
a trait
d)
an allele
43.
What is the genotype for this organism?
(E= 3 eyes, e= 1 eye)
a)
EE
b)
Ee
c)
ee
d)
EE or Ee
44.
A cross of a red cow with a white bull produces a white cow with red markings. This type of inheritance is known as
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
"breed time:
45.

Looking at this pedigree, how many female family members are carriers?

a)

4

b)

3

c)

11

d)

7

46.

Looking at this pedigree, how many family members have the disease?

a)

4

b)

7

c)

11

d)

3

47.

Which sex can be carriers of colorblindness and not have it?

a)

Just males

b)

Just females

c)

Both genders

48.
A ________________________ is a tool used to predict the possible genotype from certain parents
a)
Mendel Grid
b)
Genetic Tic Tac Toe
c)
Punnett Square
d)
Pedigree Plot
49.
What are the possible genotypes for this cross?
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
50.
How many alleles (letters) does a child get from EACH parent for each trait?
a)
1
b)
2
c)
3
d)
4
51.
The mathematical chance that an event will occur is 
a)
punnett square
b)
probability
c)
crossing over
52.
In order to show all of the possible combinations of alleles from parents, we use
a)
punnett squares
b)
phenotypes
c)
genotypes
d)
none of the above
53.
What is a segment of DNA located on chromosomes called
a)
RNA
b)
DNA
c)
gene
d)
chromosome
54.
Which parent determines the sex of a baby human?
a)
mother
b)
father
c)
both mother and father
d)
neither mother or father
55.
An example of incomplete dominance is 
a)
tabby cats
b)
ABO blood types
c)
cross red and white and get pink flowers
d)
parakeet feather colors
56.
In Mendel's experiments with pea plants, in his first generation only the dominant trait would show up...but in the second generation the recessive trait would show up in a _____ ratio of dominant : recessive 
a)
1:3
b)
4:2
c)
3:1
d)
2:2
57.
(R) round seeds are dominant to (r) wrinkled seeds and (T) tall plants are dominant to dwarf plants. If you crossed a recessive parent (rrtt) with a heterozygous parent (RrTr).  Please list the correct FOIL'd parental alleles?
a)
RT, RT, RT, RT and rt, rt, rt, rt
b)
rt, rt, rt, rt and RT, Rt, rT, rt
c)
RT, Rt, rT, rt and RT, Rt, rT, rt
d)
RR, Rr, rr, Rr and TT, Tt, tt, Tt
58.
The separation of alleles during formation of sex cells
 
a)
gametes
b)
segregation
c)
independent assortment
d)
separation
59.
There are three alleles for blood type: A, B and O. Types A and B are co-dominant, and O is recessive. Based on phenotypes in the pedigree chart below, what is the genotype of the father, Ricky?
a)
AA
b)
AO
c)
AB
d)
OO
60.
Gregor Mendel collected data on more than 28,000 pea plants in his research. Two traits he studied were seed color (yellow or green) and flower color (red or white). He found that the dominant traits are yellow seeds (Y) and red flowers (R).
If Mendel crossed plants heterozygous for yellow seeds (Yy) and heterozygous for red flowers (Rr) with plants homozygous for green seeds (yy) and heterozygous for red flowers (Rr), what fraction of their offspring will have both white flowers and green seeds?
a)
1/8
b)
1/4
c)
1/2
d)
3/4
61.
A hairline that comes to a point in the center of the forehead is called a widow's peak. Having a widow's peak is a dominant trait, while having a straight hairline is a recessive trait. Cate, a woman with a widow's peak, has two children with James, a man with a straight hairline like her father.
What is the probability that their next child will have a straight hairline?
a)
0%
b)
25%
c)
50%
d)
75%
62.
Some traits are determined by a single gene; for example, presence of freckles (F) is a dominant trait, and lack of freckles (f) is recessive. Having detached earlobes (D) is a dominant trait, and having attached earlobes (d) is recessive.
Pedro and his wife Rosa have detached earlobes, but Rosa has freckles and Pedro does not. Their daughter Jessica has attached earlobes and does not have freckles. Which of the following genotypes must Rosa have?
a)
FFDD
b)
FFDd
c)
FfDD
d)
FfDd
63.
A goat that is heterozygous for long hair (Hh) and curved horns (Cc) mates with a goat that is homozygous for short hair (hh) and straight horns (cc). Which of the following genotypes is impossible for their offspring to have?
a)
HhCc
b)
HHCc
c)
hhCc
d)
hhcc
64.
Red albino corn snakes lack the dominant black pigment trait (B). One homozygous wild-type snake is mated with one homozygous albino snake. What percent of the second generation will appear albino?
a)
25%
b)
50%
c)
75%
d)
100%
65.
Coat color in cats is polygenic. An autosomal gene codes for white color, and a sex-linked gene codes for black or orange color. The sex-linked gene is codominant, which can result in a patchy calico coat. Based on this information, which of the following is impossible to find?
a)
a white and orange male cat
b)
a black and orange male cat
c)
a black and orange female cat
d)
a black, orange, and white female cat
66.

Offspring that result from crosses between parents that are homozygous for different traits

a)

Are homozygous

b)

Make up the F2 generation

c)

Make up the parental generation

d)

Are hybrids

67.

When Gregor Mendel crossed a tall plant with a short plant, the F1plants inherited

a)

an allele for tallness from each parent.

b)

an allele for tallness from the tall parent and an allele for shortness from the short parent.

c)

an allele for shortness from each parent.

d)

an allele from only the tall parent.

68.

A pure tall plant is crossed with a short plant. If the tall F1 pea plants are allowed to self-pollinate:

a)

the offspring will be of medium height.

b)

all of the offspring will be tall.

c)

all of the offspring will be short.

d)

some of the offspring will be tall, and some will be short.

69.

A cross between a homozygous purple-flowered and a homozygous white-flowered pea plant results in offspring with purple flowers. This demonstrates

a)

incomplete dominance

b)

complete/simple dominance

c)

true-breeding

d)

co-dominance

70.

The passing of traits from parents to offspring is called:

a)

heredity

b)

genetics

c)

probability

d)

pedigree

71.

What principle explains that you can have either purple or white flowers on a tall plant or a short plant? (meaning different alleles for different (more than one) traits separate without influencing each other’s inheritance?)

a)

principle of dominance

b)

principle of independent assortment

c)

principle of probabilities

d)

principle of segregation

72.

Human blood is an example of which pattern of inheritance

a)

codominance only

b)

multiple alleles only

c)

codominance and multiple alleles

d)

Incomplete dominance only

73.

All traits are controlled by only one gene.

a)

T

b)

F

74.

There are more than two possible alleles for some traits.

a)

T

b)

F

75.

Traits that are produced by the interaction of many genes are said to be polygenic

a)

T

b)

F

76.

Based on the information in Table 1 below, which man/men could not be the father of the baby?

a)

Sammy

b)

George

c)

the waiter

d)

the cable guy

77.

A husband and wife have 2 little boys. They want to have another child. What is the probability that it will also be a boy?

a)

25%

b)

50%

c)

75%

d)

100%

e)

0%

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