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WorksheetsGenetics Review
Total questions: 41
Worksheet time: 36mins
Name
Class
Date
1.
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%
2.
This is an example of what?
a)
Complete dominance
b)
Incomplete dominance
c)
Codominance
d)
None of the above
3.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
4.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
5.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
6.
Term for homozygous organisms that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
linked genes
7.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
8.
How many boxes would say BB?
a)
1
b)
2
c)
4
d)
0
9.
This is the expression of alleles. It is the observable trait we can see _________________
a)
Dominant
b)
Homozygous
c)
Genotype
d)
Phenotype
10.
This type of allele masks the recessive allele and is capital ________________
a)
Dominant
b)
Homozygous
c)
Genotype
d)
Phenotype
11.
bb is a _________________ genotype
a)
Dominant
b)
Homozygous
c)
Genotype
d)
Phenotype
12.
BB, Bb, and bb are examples of _________________
a)
Dominant
b)
Homozygous
c)
Genotype
d)
Phenotype
13.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
14.
True/False: Different genotypes can code for the same phenotype.
a)
True
b)
False
15.
Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?
a)
100% Pp (purple)
b)
50% Pp (purple); 50% pp (white)
c)
75% Pp (purple); 25% pp (white)
d)
25% PP, 50% Pp, 25% pp
75% purple, 25% white
75% purple, 25% white
16.
One reason for Mendel's success with genetic studies of peas was that he
a)
used only hybrid pea plants
b)
used peas with large chromosomes
c)
studied large numbers of offspring
d)
discovered the sources of variation in peas
17.
What does a Punnett Square help you do?
a)
Determine the ratio of phenotypes
b)
Determine the ratio of genotypes
c)
Predict possible traits the offspring will have
d)
All of the above
18.
If the four existing children in a family are all sons, what chance would there be that the next child would also be a son?
a)
75%
b)
50%
c)
25%
d)
20%
19.
In screech owls, red feathers are dominant over gray feathers. If two heterozygous red-feathered owls are mated, what percentage of their offspring would be expected to have red feathers?
a)
25%
b)
50%
c)
75%
d)
100%
20.
Which of the following genotypes is homozygous recessive?
a)
RR
b)
Rr
c)
rr
d)
None of the Above
21.
Which of the characteristics is a lion not able to pass on to its offspring?
a)
fur color
b)
length of tail
c)
scars on leg
d)
body size
22.
He is known as the father of modern day genetics.
a)
Gregory Mendel
b)
Greg Mendel
c)
Gregor Mendel
d)
Grace Mendel
23.
Which of the following is NOT a genotype?
a)
heterozygous
b)
a trait
c)
Bb
d)
homozygous recessive
24.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
25.
Which human characteristic is controlled by polygenetic inheritance?
a)
weight
b)
skin color
c)
eye color
d)
all of the above
26.
If yellow (Y) is dominant over green (y), What is the probability to have a homozygous dominant if you cross two hybrids?
a)
100%
b)
75%
c)
25%
d)
0%
27.
In a case of incomplete dominance, if a true breeding white flower is crossed with a true breeding red flower, all of the offspring will be ____________
a)
red
b)
pink
c)
white
d)
purple
28.
Which are the possible blood phenotypes for a child who's mother is type O and father is type AB?
a)
Type O and Type A
b)
Type O and Type AB
c)
Type A and Type B
d)
Type AB only
29.
What gamete possibilities could come from this parent's genotype?
a)
AB, AB, aB, aB
b)
Ab, AB, Ab, ab
c)
Ab, Ab, Ab, Ab
d)
AB, aB, ab, aB
30.
What goes in box 1
a)
AABb
b)
AABB
c)
aabb
d)
AaBb
31.
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%
32.
What genotype is missing from this Punnett Square?
a)
RrYy
b)
RRYY
c)
rryy
d)
RrYY
33.
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
34.
What is the genotype for a pea plant heterozygous for round seeds (R), and homozygous recessive for green seeds (y)?
a)
Ry
b)
RRyy
c)
RrYy
d)
Rryy
35.
A dihybrid cross shows the possible outcomes of _______
a)
two alleles
b)
two parents
c)
two traits/characters
d)
a self pollination
36.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?
Which genotype represents a male with hemophilia?
a)
XHXh
b)
XhXh
c)
XHY
d)
XhY
37.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XBXB
d)
XbY
38.
Duchenne muscular dystrophy is a recessive x-linked disorder.
According to the Punnett square, what percentage of male offspring will have the disorder?
According to the Punnett square, what percentage of male offspring will have the disorder?
a)
0%
b)
25%
c)
50%
d)
100%
39.
What are the gametes for BbDd?
(USE FOIL)
(USE FOIL)
a)
B, b, D, d
b)
BD, bD, Bd, bd
c)
BD, BD, Bd, bd
d)
bD, bD, bd, bd
40.
Human blood type is determined by multiple alleles (A, B, and O). Which ratio would result from a cross between a man with Type AB blood and a woman with Type O blood?
a)
A. 50% Type A, 50% Type O
b)
B. 75% Type A, 25% Type B
c)
C. 50% Type A, 50% Type B
d)
D. 100% Type O
41.
When a plant with red flowers (CRCR) is crossed with a plant that has white flowers ( CWCW), the resulting offspring has pink flowers ( CRCW). If two pink flowers are crossed, what is the probability of having a pink flower?
a)
A. 0%
b)
B. 25%
c)
C. 50%
d)
D. 75%
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