7th-8th Grade Ch. 6-7 Review, Part 2 Question Preview (ID: 33820)
Chapter 6-7 Review On Cell Division And Genetics.
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What is the normal chromosome number for humans?
a) 12
b) 23
c) 24
d) 46
A ________ is an organism that has different factors for a particular trait.
a) purebred
b) dominant
c) recessive
d) hybrid
Red-green colorblindness is a ____________ trait.
a) environmentally-linked
b) sex-linked
c) purebred-linked
d) dominant-linked
The way a plant or animal looks (its physical characteristics) is called it _____________.
a) phenotype
b) genotype
c) heliotype
d) cardiotype
True or False: Skin color, height, and intelligence are each believed to be controlled by single gene inheritance.
a) True
b) False
c) Happy
d) Thanksgiving
True or False: The chromosome number of an organism is not related to its size.
a) True
b) False
c) Happy
d) Thanksgiving
True or False: Mendel was a Catholic monk.
a) True.
b) False.
c) Happy.
d) Thanksgiving.
True or False: The chromosome number is the number of genes on a particular chromosome.
a) True
b) False
c) Happy
d) Thanksgiving
True or False: Human genetic inheritance does not follow the same genetic rules as inheritance in other organisms.
a) True
b) False
c) Happy
d) Thanksgiving
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) exactly six of the puppies to have long hair.
b) approximately half of the puppies to have long hair.
c) all of the puppies to have short hair.
d) all of the puppies to have long hair.
If a TT plant is crossed with a tt plant, what will the offspring be?
a) all TT
b) all tt
c) all Tt
d) some Tt and some tt
The genes for sex-linked characteristics are usually carried on
a) the Y chromosome
b) the X chromosome
c) both the X and the Y chromosome
d) neither the X nor the Y chromosome
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) either brown or blue eyes.
b) one brown eye and one blue eye.
c) blue eyes.
d) brown eyes.
In genetics, a cross is
a) the shape of certain chromosomes.
b) one of the two alternative factors.
c) a recessive trait.
d) a test to see how traits are inherited.
According to Mendel, how many factors are there for each inherited trait?
a) three
b) two
c) one
d) one-half
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) White is dominant, and brown is recessive.
b) Brown in dominant, and white is recessive.
c) These traits are examples of incomplete dominance.
d) Not enough information is given to decide.
After Mendel published his theories, they were
a) immediately disproved.
b) never examined again.
c) ignored for thirty-five tears.
d) immediately related to other theories.
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