Chapter 15: The Chromosomal Basis of Inheritance
1. What is the function of the SRY gene on the Y chromosome?
a) To determine the rate of cell division
b) To initiate male sex determination
c) To regulate metabolic processes
d) To control blood type
2. Which of the following is an example of an autosomal dominant disorder?
a) Cystic fibrosis
b) Hemophilia
c) Huntington's disease
d) Tay-Sachs disease
3. What is the primary difference between linked genes and sex-linked genes?
a) Linked genes are found on the same chromosome; sex-linked genes are on sex
chromosomes
b) Linked genes are always dominant; sex-linked genes are recessive
c) Linked genes are inherited independently; sex-linked genes are not
d) Linked genes are on sex chromosomes; sex-linked genes are on autosomes
4. Nondisjunction can result in:
a) Aneuploidy
b) Polyploidy
c) Diploidy
d) Haploidy
5. A person with an extra chromosome 21 has:
a) Turner syndrome
b) Klinefelter syndrome
c) Down syndrome
d) Patau syndrome
6. The physical and physiological traits of an organism are referred to as its:
a) Genotype
b) Phenotype
c) Karyotype
d) None of the above
7. Which of the following is true regarding genetic linkage?
a) Genes that are linked assort independently
b) Linked genes tend to be inherited together
c) Linked genes are located on different chromosomes
d) Linked genes are always far apart on the chromosome
8. A genetic map showing the position of genes on a chromosome based on
recombination frequencies is called a:
, a) Linkage map
b) Physical map
c) Cytogenetic map
d) Genetic linkage map
9. Which of the following processes can result in genetic recombination?
a) Independent assortment of chromosomes
b) Crossing over during meiosis
c) Both a and b
d) None of the above
10. The term "wild type" refers to:
a) The most common phenotype in a population
b) A phenotype that is caused by a mutation
c) A laboratory-induced phenotype
d) None of the above
11. What is a Barr body?
a) An inactivated X chromosome in females
b) A deactivated Y chromosome in males
c) A chromosome with no genes
d) None of the above
12. Hemophilia is an example of:
13. a) An autosomal dominant disorder
b) A sex-linked recessive disorder
c) An autosomal recessive disorder
d) A chromosomal mutation
14. Polyploidy is most common in:
a) Animals
b) Plants
c) Humans
d) Fungi
15. Which process ensures the correct number of chromosomes in gametes?
a) Mitosis
b) Binary fission
c) Meiosis
d) Budding
16. A human karyotype showing 47 chromosomes indicates:
a) Normal male
b) Normal female
c) Trisomy
d) Monosomy
1. What is the function of the SRY gene on the Y chromosome?
a) To determine the rate of cell division
b) To initiate male sex determination
c) To regulate metabolic processes
d) To control blood type
2. Which of the following is an example of an autosomal dominant disorder?
a) Cystic fibrosis
b) Hemophilia
c) Huntington's disease
d) Tay-Sachs disease
3. What is the primary difference between linked genes and sex-linked genes?
a) Linked genes are found on the same chromosome; sex-linked genes are on sex
chromosomes
b) Linked genes are always dominant; sex-linked genes are recessive
c) Linked genes are inherited independently; sex-linked genes are not
d) Linked genes are on sex chromosomes; sex-linked genes are on autosomes
4. Nondisjunction can result in:
a) Aneuploidy
b) Polyploidy
c) Diploidy
d) Haploidy
5. A person with an extra chromosome 21 has:
a) Turner syndrome
b) Klinefelter syndrome
c) Down syndrome
d) Patau syndrome
6. The physical and physiological traits of an organism are referred to as its:
a) Genotype
b) Phenotype
c) Karyotype
d) None of the above
7. Which of the following is true regarding genetic linkage?
a) Genes that are linked assort independently
b) Linked genes tend to be inherited together
c) Linked genes are located on different chromosomes
d) Linked genes are always far apart on the chromosome
8. A genetic map showing the position of genes on a chromosome based on
recombination frequencies is called a:
, a) Linkage map
b) Physical map
c) Cytogenetic map
d) Genetic linkage map
9. Which of the following processes can result in genetic recombination?
a) Independent assortment of chromosomes
b) Crossing over during meiosis
c) Both a and b
d) None of the above
10. The term "wild type" refers to:
a) The most common phenotype in a population
b) A phenotype that is caused by a mutation
c) A laboratory-induced phenotype
d) None of the above
11. What is a Barr body?
a) An inactivated X chromosome in females
b) A deactivated Y chromosome in males
c) A chromosome with no genes
d) None of the above
12. Hemophilia is an example of:
13. a) An autosomal dominant disorder
b) A sex-linked recessive disorder
c) An autosomal recessive disorder
d) A chromosomal mutation
14. Polyploidy is most common in:
a) Animals
b) Plants
c) Humans
d) Fungi
15. Which process ensures the correct number of chromosomes in gametes?
a) Mitosis
b) Binary fission
c) Meiosis
d) Budding
16. A human karyotype showing 47 chromosomes indicates:
a) Normal male
b) Normal female
c) Trisomy
d) Monosomy
