WorksheetsIntroduction into Genetics 11/2/20
Total questions: 27
Worksheet time: 1hrs 2mins
Name
Class
Date
1.
Which is the correct phenotype for this organism?
a)
Brown
b)
BB
c)
Bb
d)
bb
2.
An organism's genetic make-up:
a)
recessive
b)
dominant
c)
phenotype
d)
genotype
3.
How much of your DNA do you inherit from your mom?
a)
10%
b)
25%
c)
it varies
d)
50%
4.
An example of homozygous dominant
a)
Ff
b)
hh
c)
TT
d)
bb
5.
Organisms that always produce offspring with the same traits are known as
a)
Purebred
b)
Hybrid
c)
Ancestor
d)
Mutant
6.
The hidden form of an inherited trait
a)
dominant trait
b)
recessive trait
c)
hybrid
d)
purebred
7.
What is the percentage of homozygous recessive offspring?
a)
0%
b)
25%
c)
50%
d)
75%
8.
Green peas are dominant (G) to yellow peas (g). What is the genotype for a hetereozygous dominant offspring?
a)
Gg
b)
gg
c)
GG
9.
Which of the following is a heterozygous dominant genotype?
a)
GG
b)
gg
c)
GGG
d)
Gg
10.
AA and Aa always show up as
a)
dominant
b)
recessive
11.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
12.
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
13.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
14.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
15.
aa always shows up as
a)
dominant
b)
recessive
16.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
17.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
18.
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
19.
How many pairs of chromosomes exist in each of your cells?
a)
10
b)
12
c)
23
d)
46
20.
Which statement is true?
a)
Your DNA is the same as your siblings.
b)
Your set of DNA is identical to your mothers.
c)
Your set of DNA is identical to your fathers.
d)
Your DNA is unique to you.
21.
What does a filled in square represent?
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
22.
What do half colored symbols represent?
a)
The individual is a carrier (heterozygous).
b)
The individual expresses the trait.
c)
The individual has both recessive alleles.
d)
The individual has both dominant alleles.
23.
In the second generation-how many people are carriers of the trait?
a)
2
b)
3
c)
5
d)
6
24.
How many females are in this pedigree?
a)
3
b)
4
c)
6
d)
7
25.
How many males are carriers?
a)
2
b)
3
c)
4
d)
5
26.
How many females are carriers in this family?
a)
1
b)
2
c)
3
d)
4
27.
A vertical line in a pedigree chart represents
a)
parents
b)
offspring
c)
pets
d)
mascots
100 %
