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WorksheetsGenetics Test Review
Total questions: 64
Worksheet time: 1hrs 20mins
Name
Class
Date
1.
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%
2.
A person heterozygous for wet earwax (Ww) mates with a person homozygous recessive for dry earwax. What is the chance their baby is heterozygous?
a)
0%
b)
25%
c)
50%
d)
100%
3.
Two mice heterozygous for red eyes mate. What is the expected genotypic ratio of their offspring?
a)
1 RR: 1 Rr: 1 rr
b)
0 RR: 4 Rr: 0 rr
c)
1 RR: 2 Rr: 1 rr
d)
1 RR: 1 Rr
4.
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
5.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
6.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
7.
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
8.
Which of the following is NOT a genotype?
a)
heterozygous
b)
a trait
c)
Bb
d)
homozygous recessive
9.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
10.
What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness?
a)
0 in 4
b)
1 in 4
c)
2 in 4
d)
4 in 4
11.
In squash plants, yellow fruit (Y) is dominant to white fruit (y). If two plants heterozygous for yellow fruit are crossed, what are the possible genotypes of the offspring?
a)
YY, Yy
b)
Yy
c)
YY, yy
d)
YY, Yy, and Yy
12.
an organism's appearance or other detectable characteristic
a)
genotype
b)
phenotype
c)
genetics
d)
heterozygous
13.
Jackie is homozygous recessive for having dimples (D). What is her genotype?
a)
pp
b)
Dd
c)
dd
d)
DD
14.
A ________________________ is used to predict the possible genotype from certain parents
a)
Mendel Grid
b)
Genetic Tic Tac Toe
c)
Punnett Square
d)
Pedigree Plot
15.
_____________________ are cells that join to make offspring
a)
speed cells
b)
sex cells
c)
pea cells
d)
pedigree cells
16.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
17.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
18.
father of genetics
a)
Gregor Mendel
b)
James Watson
c)
Dr. Robbins
d)
Francis Crick
19.
What type of inheritance do two alleles have if their traits blend together?
a)
Incomplete Dominance
b)
Co-Dominance
c)
Mendelian Inheritance
d)
Homozygous Inheritance
20.
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
21.
A plant shows incomplete dominance in size. A tall plant (TT) is crossed with a medium plant (TS). What fraction of plants will also be tall?
a)
100 %
b)
75%
c)
50%
d)
25%
22.
A roan cow shows co-dominance in fur color (orange and 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
23.
A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
24.
Jim has type AB+ blood. His dad could be type O+.
a)
True
b)
False
25.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
26.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
27.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
28.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
29.
What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness?
a)
0 in 4
b)
1 in 4
c)
2 in 4
d)
4 in 4
30.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
31.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
32.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
a)
rr
b)
R
c)
RR
d)
RR or Rr
33.
Which of the characteristics is a lion least likely to pass on to its offspring?
a)
fur color
b)
length of tail
c)
scars on leg
d)
body size
34.
If one of your parents is blood type A and the other is type B, which of the following blood types would you likely be?
a)
O
b)
AB
c)
A or B
d)
Any
35.
Someone who has Type O blood has what for antibodies (clumping proteins)?
a)
No antibodies
b)
A antibodies
c)
B antibodies
d)
A and B antibodies
36.
The genotypic ratio here is
a)
25% blue eye 75 % brown eye
b)
BB = 25% Bb = 50% bb = 25%
c)
BB= 50 % bb = 50%
d)
All brown eye
37.
The dominant trait is
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
38.
To be a yellow seed genotype must be
a)
aa
b)
Aa
c)
AA
d)
AA or Aa
39.
A Punnet Square will
a)
tell you exactly what your offspring will look like
b)
increase the chance you pass on recessive traits
c)
predict genotypes and phenotypes in offspring
d)
have no purpose but for Taylor to give us extra assignments
40.
What is the genotypic ratio here
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
41.
One of a number of different forms of a gene.
a)
gene
b)
gamete
c)
fertilization
d)
allele
42.
What would the genotypes be?
a)
TT, TT, Tt, Tt
b)
TT, Tt, Tt, tt
c)
Tt, Tt, tt, tt
d)
None of the above
43.
If T=Tall & t=short, what is the phenotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
44.
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
45.
Which of the following alleles is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
46.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
47.
Two heterozygous parents produce offspring. What is the probability of the HETEROZYGOUS GENOTYPE appearing in the offspring generation?
a)
75%
b)
25%
c)
50%
d)
100%
48.
HH crossed with Hh. What is the probability of hh?
a)
0%
b)
25%
c)
50%
d)
100%
49.
Two heterozygous parents produce offspring. What is the probability of the HOMOZYGOUS DOMINANT GENOTYPE appearing in the offspring generation?
a)
75%
b)
25%
c)
50%
d)
100%
50.
The genotype of the affected son and daughter at the bottom of this pedigree...
a)
could be homozygous dominant
b)
could be homozygous recessive
c)
could be heterozygous
d)
Can't tell
51.
Examine the pedigree. The allele for the presence of a widow’s peak is dominant. Therefore, we can tell from the chart that in the couple labeled 2:
a)
the male is heterozygous and the female is homozygous.
b)
the male is homozygous and the female is heterozygous.
c)
the male is homozygous and the female is homozygous.
d)
the male is heterozygous and the female is heterozygous.
52.
a)
Not Affected Male
b)
Not Affected Female
c)
Affected Male
d)
Affected Female
53.
a)
Not affected male
b)
Not affected female
c)
Affected male
d)
Affected female
54.
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
55.
What percentage of the offspring will have this recessive disease?
a)
0%
b)
25%
c)
50%
d)
75%
56.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
57.
Looking at this pedigree, how many family members have the disease?
a)
4
b)
7
c)
All
d)
None
58.
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%
59.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
60.
What genotype is missing from this Punnett Square?
a)
RrYy
b)
RRYY
c)
rryy
d)
RrYY
61.
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
62.
What fraction of offspring from the cross AaBB x Aabb will be heterozygous for both traits?
a)
1/16
b)
1/4
c)
1/2
d)
3/16
63.
Cross Two Homozygous plants
(RRYY x rryy)
R = round seeds, r = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds?
(RRYY x rryy)
R = round seeds, r = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds?
a)
0%
b)
25%
c)
50%
d)
100%
64.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
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