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WorksheetsGenetics Quiz
Total questions: 10
Worksheet time: 7mins
Name
Class
Date
1.
Phenotype or Genotype? The combination of alleles/letters
a)
Phenotype
b)
Genotype
2.
Phenotype or Genotype? The physical expression/appearance of a gene
a)
Phenotype
b)
Genotype
3.
This trait is hidden whenever the dominant allele is present
a)
dominant allele
b)
recessive allele
c)
Punnett square
d)
codominance
4.
Identify the homozygous dominant genotype:
a)
Ff
b)
FF
c)
ff
d)
fF
5.
Which of the following genotypes is heterozygous?
a)
bb
b)
BB
c)
B
d)
Bb
6.
An organism that has two identical (THE SAME) alleles for a trait.
a)
heterozygous
b)
twin
c)
homozygous
d)
dominant
7.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
8.
In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant (tt)?
a)
0%
b)
25%
c)
50%
d)
75%
9.
What are the possible genotypes for this cross?
a)
TT = 25% Tt= 50% tt=25%
b)
tt = 100%
c)
TT= 75% tt = 25%
d)
Tt = 100%
10.
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
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