WorksheetsGenotypes and Phenotypes
Total questions: 13
Worksheet time: 32mins
Name
Class
Date
1.
Which of the following is the correct definition for a genotype?
a)
The physical expression of a gene. (Characteristics)
b)
A strand of DNA made up of multiple mutations.
c)
The expression of one of your parents traits.
d)
The set of genes in our DNA which is responsible for a particular trait.
2.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
3.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
4.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
5.
An example of a heterozygous gene is
a)
FF
b)
ff
c)
Ff
6.
An example of a homozygous recessive gene is
a)
Dd
b)
DD
c)
dd
d)
DAB
7.
An example of a homozygous dominant gene is
a)
Dd
b)
DD
c)
dd
d)
DAB
8.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
9.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
10.
Alternative forms of a gene are called
a)
Alleles
b)
Homozygous
c)
DNA
d)
Genetics
11.
Hair colour is an example of
a)
genotype
b)
phenotype
12.
Mark is heterozygous. If B is for brown hair, and b is for blonde hair, what is Mark's genotype?
a)
BB
b)
bb
c)
Bb
d)
bB
13.
Which of the following genotypes is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
tT
100 %
