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WorksheetsGenetics
Total questions: 22
Worksheet time: 17mins
Name
Class
Date
1.
Select ALL dominant alleles.
a)
H
b)
u
c)
Z
d)
b
2.
Select ALL recessive alleles.
a)
H
b)
u
c)
Z
d)
b
3.
How many alleles do you get from each parent?
a)
1
b)
2
c)
It depends on the gene.
4.
Select ALL examples of heterozygous alleles below.
a)
Bb
b)
AA
c)
Rr
d)
nn
e)
pp
5.
Select ALL examples of homozygous alleles below.
a)
Bb
b)
AA
c)
Rr
d)
nn
e)
pp
6.
The exact genetic makeup of an organism, such as RR, Tt, PP is its?
a)
phenotype
b)
dominance
c)
genotype
d)
trait
7.
What an organism looks like. Such as: brown eyes, spotted fur, yellow feathers.
a)
phenotype
b)
dominance
c)
genotype
d)
trait
8.
Y for yellow body is dominant over y for blue body. What alleles would produce yellow bodies?
a)
YY,yy
b)
Yy,yy
c)
YY only
d)
YY,Yy
9.
If "T" is the allele for tall and "t" is the allele for short, then Tt would produce?
a)
tall
b)
short
c)
medium
d)
not enough info
10.
What is the relationship between DNA and chromosomes?
a)
Chromosomes are made of DNA
b)
DNA is made of chromosomes
c)
DNA and chromosomes are the same thing.
d)
All of the above are correct
11.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
12.
What does heterozygous mean?
a)
An organism that has the same genes for a trait (TT or tt)
b)
An organism that has different genes for a trait (Tt)
c)
When neither gene is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
13.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
14.
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
15.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
16.
Fill in the Yellow Box
a)
Bb
b)
BB
c)
bb
17.
What is the yellow seed genotype?
a)
aa
b)
Aa
c)
AA
d)
AA or Aa
18.
What genotype would go in box 2?
a)
BB
b)
Bb
c)
bb
d)
bB
19.
What genotype would go in box 4?
a)
BB
b)
Bb
c)
bb
d)
bB
20.
What genotype would go in box 1?
a)
BB
b)
Bb
c)
bb
21.
B = brown fur b = white fur
In the punnett square, what is the probability for white fur?
In the punnett square, what is the probability for white fur?
a)
0%
b)
25%
c)
50%
d)
75%
22.
What are the phenotype percentages of the offspring?
(A-Brown fur color; a-white fur color)
a)
50 % Brown fur and 50% White fur
b)
25 % Brown fur and 75% White fur
c)
75 % Brown fur and 25% White fur
d)
0% Brown fur and 100% White fur
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