Glencoe Biology

Chapter 11: Complex Inheritance and Human Heredity

Standardized Test Practice-English

1
A dominant genetic disorder called ____ affects the nervous system and brain.
A)sickle-cell anemia
B)Huntington's disease
C)galactosemia
D)achondroplasia
2
An individual who is heterozygous for a recessive disorder is called a ____.
A)recessive
B)carrier
C)pedigree
D)autosome
3
A recessive genetic disorder called ____ results in a lack of melanin.
A)achondroplasia
B)cystic fibrosis
C)Huntington's disease
D)albinism
4
What does this figure represent?

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A)all family members express trait
B)a family with no carriers
C)a family with some carriers
D)a genetic map of single individual
5
How is it possible that one of the children in this pedigree expresses Tay-Sachs?

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A)carrier parents passed both recessive alleles
B)parents expressed the disease
C)child was infected by siblings
D)child is heterozygous dominant
6
This shows the crossing of snapdragons. What is the phenotypic ratio for this incomplete dominant cross?

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A)2:1
B)1:2:1
C)2:2
D)3:1
7
What has occurred when red and white snapdragons have heterozygous pink flowers?
A)incomplete dominance
B)full dominance
C)no genes were passed
D)mutation
8
Human blood groups are determined by ____.
A)the removal of all alleles
B)single alleles
C)chromosome inactivation
D)multiple alleles
9
Why is sickle-cell disease a codominant genetic condition?
A)Both alleles are expressed in the homozygous condition.
B)No alleles are expressed in the heterozygous condition.
C)Both alleles are expressed in the heterozygous condition.
D)An intermediate phenotype is expressed.
10
What happens during dosage compensation in sex cells?
A)Y chromosome stops working
B)X chromosome stops working
C)both sex chromosomes stop working
D)men do not receive an X chromosome
11
Study this Punnett square. Why does the father not have color blindness?

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A)He does not have the recessive allele.
B)He has a Y chromosome.
C)He has two recessive alleles.
D)He is missing the X chromosome.
12
Micrograph images used to study chromosomes are called ____.
A)Punnett squares
B)telomeres
C)karyotypes
D)nucleotides
13
Cell division in which sister chromatids fail to separate properly is called ____.
A)incomplete dominance
B)karyotype
C)polygenic division
D)nondisjunction
14
What does the condition shown here cause in cats?

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A)active X chromosomes
B)calico pattern
C)inactive Y chromosomes
D)blindness
15
What does this table show examples of?

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A)nondisjunction in sex chromosomes
B)karyotypes for sex chromosomes
C)pedigree for diseases
D)telomeres
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