WorksheetsPhenotype and Genotype 9 GEN
Total questions: 15
Worksheet time: 35mins
Name
Class
Date
1.
Which of the following is an example of a homozygous genotype?
a)
Rr
b)
rr
c)
NN
d)
Nr
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.
T - tall and t = short
In the punnett square below, what belongs in the missing square
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
6.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
7.
Hair colour is an example of
a)
genotype
b)
phenotype
8.
If a trait is recessive, it needs to be inherited from ___ parents to be 'expressed'.
a)
one
b)
both
9.
Punnett Square
a)
a genetic factor that blocks another genetic factor
b)
a genetic factor that is blocked by the presence of a dominant factor
c)
physical appearance of a trait
d)
a model used to predict possible genotypes and phenotypes of offspring
10.
Physical appearance of a trait
a)
gene
b)
allele
c)
genotype
d)
phenotype
11.
How tall you are is an example of
a)
genotype
b)
phenotype
12.
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
13.
A segment of DNA that codes for a trait
a)
gene
b)
centromere
c)
chromosome
d)
chromatid
14.
Genetic traits are determined by one or more
a)
genes
b)
organelles
c)
random chances
d)
cells
15.
A version or variation of a gene
a)
trait
b)
gene
c)
allele
d)
DNA
100 %
