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WorksheetsGenetics Review - Biology
Total questions: 40
Worksheet time: 28mins
Name
Class
Date
1.
Gregor Mendel used pea plants to study
a)
Inheritance of traits
b)
flowering
c)
cross-pollination
2.
If a Heterozygous Rr pea plant is crossed with a Homozygous rr pea plant, what would be the percentage that the offspring will be recessive rr?
a)
50%
b)
75%
c)
25%
3.
If a Mother with Type A (Ao) blood and a father with type O (oo) blood have children, what would be the percentage that their offspring would be Type B blood?
a)
50%
b)
0%
c)
35%
4.
Organisms that have 2 of the same alleles for a particular trait are said to be
a)
heterozygous
b)
hybrid
c)
homozygous
5.
When 2 dominant alleles (HB) are both expressed are said to be
a)
codominant
b)
diploid
c)
incomplete dominant
6.
A pea plant that has 2 different alleles for the same trait is said to be
a)
Homozygous
b)
Heterozygous
c)
Phenotype
7.
How many recessive alleles for a trait must an organism inherit in order to show that trait?
a)
3
b)
1
c)
2
8.
How many children will have the disease? (look at the picture to help you)
a)
1
b)
0
c)
2
9.
How many girls will be carriers?
a)
1
b)
0
c)
2
10.
What percent of children will be normal?
a)
50%
b)
25%
c)
0%
11.
A characteristic that is passed from parents to offspring is called a ____
a)
Allele
b)
Trait
c)
Gene
12.
Small Pieces of DNA are called ______.
a)
Traits
b)
Genes
c)
Alleles
13.
Different forms of a gene are known as
a)
Alleles
b)
Dominant
c)
recessive
14.
The gene combination Hh is_____
a)
Heterozygous
b)
Homozygous
c)
Recessive
15.
Which of the following is an example of a heterozygous genotype?
a)
AA
b)
Aa
c)
aa
16.
A woman has blood type O (oo) and she marries a person with blood type AB. What possible blood types can the children have?
a)
Type A; Type B
b)
Type A; Type B; Type AB
c)
Type O, Type AB
17.
A woman has blood type O (oo) and she marries a person with blood type AB. The baby has blood type AB. Is it possible this is the father of the baby?
a)
yes
b)
no
18.
What does RR represent?
a)
red
b)
pink
c)
white
19.
What does rr represent?
a)
red
b)
pink
c)
white
20.
What is the genotype of the pink flowers?
a)
RR
b)
Rr
c)
rr
21.
What do the alleles show in the picture?
a)
Codominance
b)
Dominance
c)
Incomplete dominance
22.
If 1 red and 1 white flower is crossed, what percent of their offspring are expected to be pink-flowers?
a)
100%
b)
50%
c)
75%
23.
If a pink flower is crossed with a pink flower, what percent of their offspring are expected to be pink-flowered?
a)
25%
b)
75%
c)
50%
24.
When constructing a pedigree, what does a circle represent?
a)
female
b)
male
25.
How many people have the trait?
a)
1
b)
3
c)
2
26.
How many are affected in the 2nd generation?
a)
1
b)
2
c)
3
27.
How many generations are in the pedigree?
a)
1
b)
2
c)
3
28.
How many males have the trait?
a)
1
b)
2
c)
3
29.
Genetic Drift is a change in allele frequency due to
a)
natural selection
b)
chance
c)
artificial selection
30.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
31.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
32.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
33.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
34.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
35.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
36.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
37.
How many boxes would say BB?
a)
1
b)
2
c)
4
d)
0
38.
Squidward has light blue skin, and his genotype for this trait is Bb. Would Squidward be considered a purebred or hybrid for light blue skin?
a)
Purebred
b)
Hybrid
39.
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%
40.
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
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