WorksheetsGenetics Squares
Total questions: 14
Worksheet time: 18mins
Name
Class
Date
1.
TT,tt,PP,pp,SS,ss are examples of alleles that are?
a)
homozygous
b)
heterozygous
c)
different
d)
homologous
2.
The exact genetic makeup of an organism, such as RR, Tt, PP is its?
a)
phenotype
b)
dominance
c)
genotype
d)
trait
3.
A physical characteristic that can be passed from parent to offspring.
a)
behavior
b)
trait
c)
strong muscles
d)
ability to fly a plane.
4.
Using the Punnett Square, identify the correct Genotypic ratio
a)
2:2:1
b)
1:2:1
c)
2:1:1
d)
1:1:1
5.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XbY
d)
XBY
6.
What would the genotype be of a colorblind male?
a)
XNY
b)
XNYn
c)
XnY
d)
XnYn
7.
The green fish offspring in this image is an example of ---
a)
Incomplete dominance
b)
Codominance
8.
Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be black?
a)
25
b)
50
c)
75
d)
100
9.
What goes in box 3
a)
Aabb
b)
AABB
c)
AAbb
d)
aaBb
10.
Using the dihybrid cross and key provided, what is the probability of the offspring being tall and white?
a)
9
b)
2
c)
3
d)
6
11.
What are the possible genotypes for this cross?
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
12.
Select the following options that represent a genotype.
a)
Rr
b)
Round peas
c)
Smooth peas
d)
rr
13.
What is considered to be the phenotype?
a)
Double stranded chromosomes
b)
The physical trait that is expressed
c)
The combination of genes
d)
All of the genetic information
14.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
100 %
