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WorksheetsGenetics
Total questions: 14
Worksheet time: 7mins
Name
Class
Date
1.
What is the basic function of chromosomes in the nucleus of a cell?
a)
to protect the cell
b)
to transport nutrients
c)
to release energy from food
d)
to store genetic information
2.
If a child inherits one dominant allele for dimples (D) and one recessive allele for no dimples (d), the phenotype will be ___________.
a)
Dd
b)
DD
c)
dimples
d)
no dimples
3.
An organism with a hybrid trait has _________.
a)
two identical alleles for a trait
b)
only one allele for a trait
c)
two different alleles for a trait
d)
three different alleles for a trait
4.
In rabbits, black fur (B) is dominant over brown fur (b). If a rabbit has black fur, which of the following shows the possible genotype(s).
a)
BB and Bb
b)
bb only
c)
Black only
d)
BB and bb
5.
Identical twins are raised by different families. The twins have some traits in common, but some are different. This is because _______.
a)
the twin's genotypes are not identical
b)
certain alleles are different in each twin
c)
environmental factors can influence traits
d)
the twins experienced identical environments
6.
A person's environment can affect his or her _______ for certain characteristics, such as skin tone or markings.
a)
genotype
b)
phenotype
c)
recessive traits
d)
dominant traits
7.
Purebred is another term for _________
a)
genotype
b)
phenotype
c)
homozygous
d)
heterozygous
8.
A dog had a litter of puppies. The puppies all had the same eye color and ear shape as the parents. These two traits are ________.
a)
altered
b)
recessive
c)
environmental
d)
inherited
9.
Brown eye color (B) is dominant to blue eye color (b). According to this Punnett Square what percentage of offspring will have brown eyes?
a)
25%
b)
50%
c)
75%
d)
100%
10.
Red flowers (R) are dominant to white flowers (r). Using this information give the genotype of the offspring.
a)
Rr
b)
rr
c)
red
d)
white
11.
Give the genotype for a person with a recessive trait.
a)
BB
b)
bb
c)
Bb
d)
they would not have a genotype
12.
Which of the characteristics of a field mouse is most likely inherited from its parents?
a)
brown fur
b)
torn ear
c)
scar on its leg
d)
chipped tooth
13.
If a pure dominant red rose plant is crossed with a pure recessive white rose plant, what is the probability that the offspring will have red flowers?
a)
100%
b)
75%
c)
50%
d)
25%
14.
What is the correct relationship for genetic material in a cell?
a)
Chromosomes are located on genes in DNA
b)
A nucleus is inside chromosomes made of genes
c)
Genes containing DNA are located on chromosomes
d)
DNA is not found in the nucleus but floats in the cytoplasm
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