WorksheetsGenetics
Total questions: 40
Worksheet time: 56mins
Name
Class
Date
1.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
2.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous genes
d)
mutated DNA
3.
Aa is
a)
homozygous (purebred)
b)
heterozygous (hybrid)
4.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
5.
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
6.
T = tall an t = short
What is the phenotype for Tt?
What is the phenotype for Tt?
a)
short
b)
tall
c)
medium sized
d)
neither tall or short
7.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
8.
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
9.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
10.
When a capital letter is used, what kind of allele is being represented?
a)
Recessive Allele
b)
Codominance
c)
Punnett Squares
d)
Dominant Allele
11.
When two identical alleles for a trait are in an organism, the organism is said to be ____________?
a)
Heterozygous
b)
Homozygous
c)
allele
d)
resseive
12.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
13.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
14.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
15.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
16.
Sex cells are produced through the process of
a)
mitosis
b)
cytokinesis
c)
binary fission
d)
meiosis
17.
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
18.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
19.
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
20.
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
21.
Which sentence is TRUE?
a)
Acquired traits are passed from parents to offspring
b)
Inherited traits are passed from parents to offspring
c)
Behaviors are never inherited
d)
Behaviors are always inherited
22.
Heterozygous is when...
a)
the alleles are the same.
b)
the alleles are different.
c)
the alleles are absent.
d)
the alleles are present.
23.
The genotypes AA and Aa always show up as the __________ phenotype.
a)
dominant
b)
recessive
24.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
25.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
26.
A recessive allele is represented by a ______ letter.
a)
lower-case
b)
capital
27.
Blue-eyed is a ______.
a)
genotype
b)
phenotype
28.
Bb is a ______.
a)
genotype
b)
phenotype
29.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
30.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
31.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
32.
One form of a gene is called_______________
a)
a DNA
b)
a Phenotype
c)
a trait
d)
an allele
33.
Which of the following genotypes is a purebred?
a)
Bb
b)
Gg
c)
bb
d)
Dd
34.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
35.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
36.
How many pairs of chromosomes exist in each of your cells?
a)
10
b)
12
c)
23
d)
46
37.
Why are your chromosomes arranged in pairs?
a)
Scientists have no idea
b)
Because you get one from your mom and one from your dad
c)
Because pairs can divide easier
d)
Because DNA is awesome
38.
Which statement is true?
a)
Your DNA is the same as your siblings.
b)
Your set of DNA is identical to your mothers.
c)
Your set of DNA is identical to your fathers.
d)
Your DNA is unique to you.
39.
Which is true about DNA?
a)
Only animals have DNA in their cells
b)
DNA research is simple and quick
c)
DNA contains many genes
d)
None of the above are true.
40.
Inherited traits are controlled by
a)
genetic information in the genes
b)
the environment a baby is born into
c)
the nucleus and mitochondria
d)
none of the above
100 %
