WorksheetsGenetics 2
Total questions: 15
Worksheet time: 38mins
Name
Class
Date
1.
In a punnet square where are the parent alleles written?
a)
Top and inside the boxes
b)
Only on the left and right side of the boxes.
c)
outside of the boxes (top and left side)
d)
All on the top side of the boxes
2.
Each one of the boxes on the Punnett Square represents what probability of an offsprings' genotype?
a)
25%
b)
1%
c)
10%
d)
0%
3.
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
4.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
5.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
6.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
7.
DNA is stored in the _________ of cells.
a)
Mitochondria
b)
Nucleus
c)
Endoplasmic Reticulum (E.R.)
8.
Each section of DNA that codes for a specific trait is called a _______.
a)
gene
b)
DNA
c)
base pair
9.
Homozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
10.
The combination of alleles.
a)
DNA
b)
Phenotype
c)
Genotype
d)
Genetics
11.
A section on a chromosome that has genetic information for one trait is called a
a)
gene
b)
allele
c)
phenotype
d)
genotype
12.
Having blue eyes is an example of
a)
genotype
b)
phenotype
13.
A heterozygous long-tusked elephant (Tt) is crossed with a homozygous recessive short-tusked (tt) elephant. What is the probability of the offspring having short tusks?
a)
0%
b)
25%
c)
50%
d)
75%
14.
What is the probability of heterozygous offspring?
a)
25%
b)
50%
c)
0%
d)
100%
15.
Purple (P) is dominant to the white (p).
According to the Punnett Square, what is the probability of an offspring being purple?
a)
25%
b)
0%
c)
100%
d)
50%
100 %
