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WorksheetsBolden Genetics
Total questions: 45
Worksheet time: 25mins
Name
Class
Date
1.
Aa, DD, bB, yy are all examples of
a)
Genotypes
b)
Pheontypes
2.
AA and Aa always show upas
a)
dominant
b)
recessive
3.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
4.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
5.
What is the total number of affected males are in generations 4 and 5?
a)
3
b)
7
c)
1
d)
2
6.
aa always shows up as
a)
dominant
b)
recessive
7.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
8.
What gender has an X and a Y chromosome?
a)
male
b)
female
9.
At leas how many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
10.
How many alleles (letters)does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
11.
The traits of an organism are passed to its offspring on small coded strands of DNA material called
a)
meiosis
b)
recessive traits
c)
genes
d)
heredity
12.
What is the total number of affected males are in generations 4 and 5?
a)
3
b)
7
c)
1
d)
2
13.
What genotype would be in the missing square?
a)
AA
b)
aa
c)
Aa
d)
aA
14.
True/False: The passing of traits from one parent to offspring is heredity.
a)
true
b)
false
15.
HETEROZYGOUS means:
a)
same
b)
different
16.
B=Blonde Hair b=Brown Hair
If a person was Bb they would have
If a person was Bb they would have
a)
Blonde Hair
b)
Brown Hair
17.
What shape is DNA?
a)
Double Helix
b)
Double Trouble
c)
Double Bubble
d)
Double Double
18.
HH is
a)
Homozygous dominant
b)
homozygous recessive
19.
What % will be homozygous recessive?
a)
0%
b)
25%
c)
50%
d)
75%
20.
What % is heterozygous?
a)
25%
b)
50%
c)
0%
d)
100%
21.
How many generations are in this pedigree?
a)
3
b)
4
c)
5
d)
6
22.
What type of trait is shown in this example?
a)
complete dominance
b)
incomplete dominance
c)
codominance
23.
a)
codominance
b)
incomplete dominance
c)
complete dominance
24.
Codominance =
a)
NEW
b)
BLENDED/HYBRID
c)
DOMINANT ALLELE
25.
Incomplete dominance =
a)
NEW
b)
BLENDEND/HYBRID
c)
Dominant Allele
26.
Complete dominance =
a)
NEW
b)
BLENDEND/HYBRID
c)
Dominant Allele
27.
True or false?
a)
True
b)
False
28.
a)
codominance
b)
incomplete dominance
c)
complete dominance
d)
nondominance
29.
Male =
a)
xx
b)
xy
30.
Female =
a)
xx
b)
xy
31.
In what generation are there 2 unaffected males?
a)
Gen 1
b)
Gen 2
c)
Gen 3
d)
Gen 1 and 2
32.
B=brown eyes
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
a)
they have same phenotype and genotype
b)
they have different genotypes and phenotypes
c)
they have same phenotype but different genotypes
d)
they have same genotype but different phenotypes
33.
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
34.
If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring?
a)
100% Tt
b)
50% Tt, 50% tt
c)
75%Tt, 25%tt
d)
25%TT, 50%Tt, 25%tt
35.
This is an example of what?
a)
Complete dominance
b)
Incomplete dominance
c)
Codominance
d)
None of the above
36.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
37.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
38.
Snapdragon flowers come in red, pink and white. What type of inheritance is this?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Codominance
d)
Polygenic Inheritance
39.
W=white hair
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
a)
none
b)
3/4
c)
1/2
d)
all
40.
What is a phenotype?
a)
The expression of a trait; what you see.
b)
refers to the genetic makeup of an individual
c)
An organism that has the same genes for a trait (ex. TT or tt)
d)
the passing of traits from parent to offspring
41.
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
42.
The inherited combination of alleles is known as the offspring's
a)
heredity
b)
phenotype
c)
genotype
d)
redigree
43.
The man who studied genetics and came up with genetics is
a)
Watson
b)
Crick
c)
Mendel
d)
Darwin
44.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
45.
Magda is a tall, 11 year old drummer. She has a scar on her right cheek. She is good at swimming. Which of her traits did Magda most likely inherit?
a)
height
b)
the scar
c)
ability to swim
d)
ability to play drums
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