WorksheetsGenetics Test Review-7th grade
Total questions: 20
Worksheet time: 3570secs
Name
Class
Date
1.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
c)
Independent assortment
d)
Recessive inheritance
2.
What type of inheritance do two alleles have if their traits blend together?
a)
Incomplete Dominance
b)
Co-Dominance
c)
Mendelian Inheritance
d)
Homozygous Inheritance
3.
A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
4.
T = tall and t = short
TT and Tt would result in the following phenotype
TT and Tt would result in the following phenotype
a)
short
b)
tall
c)
both tall and short
d)
neither tall or short
5.
Which of the following alleles is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
6.
What is a phenotype?
a)
The expression of a trait; physical appearance.
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
7.
What characteristic would a child not inherit from parents?
a)
freckles
b)
eye color
c)
hair style
d)
dimples
8.
Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
9.
Who is the father of genetics?
a)
Charles Darwin
b)
Gregor Mendel
c)
Dimitri Mendeleev
d)
Hans Krebs
10.
What is the passing of traits from parents to offspring known as?
a)
Heredity
b)
Genetics
c)
Punnett Square
11.
The scientific study of heredity is ____.
a)
Genetics
b)
Punnett squares
c)
Inheritance
d)
Biology
12.
In the second generation-how many people have the disease or display the physical trait?
a)
2
b)
4
c)
5
d)
6
13.
In the second generation-how many people are carriers of the trait?
a)
2
b)
3
c)
5
d)
6
14.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
15.
A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:
a)
all black
b)
all white
c)
all gray
d)
speckled black and white
16.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
codominance
c)
complete dominance
d)
recessive pattern
17.
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%
18.
What is the difference between rough and smooth ER?
a)
There is no difference.
b)
Plants have rough ER, animals have smooth ER.
c)
What type of injuries the Doctors treat.
d)
Rough has ribosomes, smooth does not.
19.
All living things are made up of...
a)
cells
b)
cell tissues
c)
organ
d)
organ systems
20.
Who was the first person to observe unicellular organisms?
a)
Robert Hooke
b)
Mathias Schleiden
c)
Anton Van Leewenhoek
d)
Robert Brown
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