Download Ch 11 Standards Test Practice

Chapter 11
Name
Date
You and your colleagues are constructing a
1 pedigree
for a boy with cystic fibrosis. The
individual’s younger brother has also been
diagnosed with cystic fibrosis. How would
these brothers be represented in a pedigree?
A Both would be represented as completely
shaded circles.
B Both would be represented as completely
shaded squares.
C The older brother would be a shaded square,
while the younger brother would be a
half-shaded square.
D Both would be represented as unshaded squares.
2
Which disorder is treated by restricting milk in
the diet?
A albinism
B cystic fibrosis
C galactosemia
D Tay-Sachs disease
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
man carrying the allele for Huntington’s
3 Adisease
marries a woman who is homozygous
recessive for the allele. What is the probability
that their offspring will develop Huntington’s
disease?
A 25 percent
B 50 percent
C 75 percent
D 100 percent
diagram below illustrates fertilization
4 Which
that would lead to development of a normal
human female?
8
8
8
gene for brown eyes (B) is dominant over the
5 The
gene for blue eyes (b). Two brown-eyed people
have a blue-eyed child. Which genotypes make
this possible?
A The mother and father are both homozygous
brown eyed (BB).
B The mother is homozygous brown eyed (BB)
and the father is heterozygous brown-eyed (Bb).
C The mother is heterozygous brown-eyed (Bb),
and the father is homozygous brown-eyed (BB).
D The mother and the father are both heterozygous brown-eyed (Bb).
During warm temperatures of summer, the
6 arctic
fox produces enzymes that cause its fur
to become reddish brown. During the cold
temperatures of winter, these enzymes do not
function. As a result, the fox has a white coat
that blends into the snowy background. What
explains this change in color?
A The genes of a fox are made of unstable DNA.
B Mutations can be caused by temperature
extremes.
C Random alteration of DNA can occur on certain
chromosomes.
D The expression of certain genes is affected by
temperature.
Which does NOT play a role in determining an
7 individual’s
sex?
A
B
C
D
gametes
chromosomes
meiosis
autosomes
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STANDARDIZED TEST PRACTICE
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CHAPTER 11
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Chapter 11
Name
Date
can you conclude about the trait followed
8 What
in the pedigree below?
Class
woman who is not colorblind is married to a
bm Aman
who is not colorblind. They have, however,
a son who is red-green colorblind. What is the
mother’s genotype?
A XBXB
B XBXb
C XbXb
D XBX
generation.
B It is coded for a sex-linked gene.
C It affects only females.
D The trait shows polygenic inheritance.
individual has type AB blood. His father has
9 An
type A blood and his mother has type B blood.
What is the individual’s phenotype an example of?
A simple recessive heredity
B simple dominant heredity
C incomplete dominance
D codominance
the blood cells in the picture below.
bk Study
Describe the genotype for the individual with
these types of cells.
traits, such as stem length in plants and
bn Many
skin color and height in humans, are controlled
by two or more genes. What is this called?
A simple dominant inheritance
B monogenic inheritance
C polygenic inheritance
D codominance
micrograph of matched pairs of human
bo Achromosomes
can be used to confirm the
overall condition of homologous chromosomes
in an individual. What is this diagnostic tool
called?
A karyotype
B telomere
C polygenic trait
D twin testing
controlled by genes on the X chromosome
bp Traits
are called sex-linked traits. In what individuals
Normal red
blood cell
A
B
C
D
Sickle cell
homozygous recessive
heterozygous
homozygous dominant
codominant
are recessive sex-linked traits more commonly
expressed?
A males because they have a Y chromosome
B females because they have two X chromosomes
C children who later outgrow conditions
brought on by the traits
D males because they have only one X
chromosome
syndrome is the result of an extra
bl Down
chromosome 21 in a gamete. What caused
this to happen?
A nondisjunction
B telomeres
C environment
D chromosome inactivation
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CHAPTER 11
STANDARDIZED TEST PRACTICE
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
A It is incompletely dominant in every other