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7th-8th Grade Ch. 6-7 Review, Part 2
Test Description: Chapter 6-7 Review on Cell Division and Genetics
Instructions: Answer all questions to get your test result.
1) What is the normal chromosome number for humans?
A
46
B
23
C
12
D
24
2) A ________ is an organism that has different factors for a particular trait.
A
purebred
B
recessive
C
hybrid
D
dominant
3) Red-green colorblindness is a ____________ trait.
A
dominant-linked
B
purebred-linked
C
sex-linked
D
environmentally-linked
4) The way a plant or animal looks (its physical characteristics) is called it _____________.
A
phenotype
B
genotype
C
heliotype
D
cardiotype
5) True or False: Skin color, height, and intelligence are each believed to be controlled by single gene inheritance.
A
Thanksgiving
B
Happy
C
True
D
False
6) True or False: The chromosome number of an organism is not related to its size.
A
True
B
Thanksgiving
C
False
D
Happy
7) True or False: Mendel was a Catholic monk.
A
True.
B
False.
C
Thanksgiving.
D
Happy.
8) True or False: The chromosome number is the number of genes on a particular chromosome.
A
Happy
B
True
C
Thanksgiving
D
False
9) True or False: Human genetic inheritance does not follow the same genetic rules as inheritance in other organisms.
A
Thanksgiving
B
True
C
False
D
Happy
10) Suppose that in dogs long hair is dominant and short hair is recessive. If a hybrid long-haired dog mates with a purebred short-haired dog and twelve puppies are produced, one would expect
A
approximately half of the puppies to have long hair.
B
all of the puppies to have long hair.
C
exactly six of the puppies to have long hair.
D
all of the puppies to have short hair.
11) If a TT plant is crossed with a tt plant, what will the offspring be?
A
all Tt
B
all tt
C
some Tt and some tt
D
all TT
12) The genes for sex-linked characteristics are usually carried on
A
the Y chromosome
B
the X chromosome
C
neither the X nor the Y chromosome
D
both the X and the Y chromosome
13) Suppose that in cats brown eyes are dominant and blue eyes are recessive. If a purebred brown-eyed cat mates with a purebred blue-eyed cat and one kitten is produced, one would expect the kitten to have
A
one brown eye and one blue eye.
B
either brown or blue eyes.
C
blue eyes.
D
brown eyes.
14) In genetics, a cross is
A
one of the two alternative factors.
B
the shape of certain chromosomes.
C
a recessive trait.
D
a test to see how traits are inherited.
15) According to Mendel, how many factors are there for each inherited trait?
A
one
B
one-half
C
three
D
two
16) If a purebred brown hamster mates with a purebred white hamster and all of the offspring in the first offspring generation are brown, which statement is true of the brown and white traits?
A
These traits are examples of incomplete dominance.
B
Not enough information is given to decide.
C
Brown in dominant, and white is recessive.
D
White is dominant, and brown is recessive.
17) After Mendel published his theories, they were
A
ignored for thirty-five tears.
B
never examined again.
C
immediately related to other theories.
D
immediately disproved.
*select an answer for all questions
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