Pathophysiology Exam 1 Study Guide 2026:
Practice Questions & Answer Explanations
Description:
Master your Pathophysiology Exam 1 with this comprehensive 2026 study guide featuring
essential practice questions across genetics, cellular injury, and immunology. Our targeted
review covers key topics including karyotypes, inheritance patterns, adaptive cell changes,
inflammatory response, and immune system function with detailed answer explanations.
Each question is designed to test your clinical reasoning and help you identify knowledge gaps.
Perfect for nursing and medical students preparing for midterms or finals, this resource provides
the strategic practice you need to excel. Get exam-ready faster
Download your ultimate pathophysiology study companion now!
, Pathophysiology Exam 1 Review: Questions & Explained Answers
(2026)
1. What term describes a systematized arrangement of chromosomes from a single cell, used for
genetic analysis?
A) Metaphase spread
B) Autosomal array
C) Karyotype
D) Anaphase distribution
Answer: C
Explanation: A karyotype is the standardized organization of an individual's chromosomes,
photographed during metaphase, and arranged in pairs by size and structure, which is
fundamental for diagnosing genetic disorders.
2. The failure of paired chromosomes to segregate properly during meiotic cell division is known
as:
A) Aneuploidy
B) Nondisjunction
C) Polyploidy
D) Anaplasia
Answer: B
Explanation: Nondisjunction is the specific error in meiosis where homologous chromosomes
or sister chromatids fail to separate, leading to gametes with an abnormal number of
chromosomes.
3. A body cell that possesses an irregular number of chromosomes, not an exact multiple of the
haploid set, is classified as:
A) an aneuploid cell.
B) a euploid cell.
C) a polyploid cell.
D) a haploid cell.
Answer: A
Explanation: Aneuploidy refers to a somatic cell having an abnormal number of chromosomes,
, such as 45 or 47, rather than the normal 46 in humans, which is distinct from euploidy (normal
number) or polyploidy (multiple complete sets).
4. A genetic analysis of a stillborn fetus reveals a total of 92 chromosomes. What is the correct term
for this condition?
A) Euploidy
B) Triploidy
C) Tetraploidy
D) Aneuploidy
Answer: C
Explanation: A chromosome count of 92 represents four sets of chromosomes (4n), which is
termed tetraploidy. This is typically incompatible with life and a cause of miscarriage.
5. An individual with chromosomal mosaicism may typically present with:
A) being an asymptomatic carrier.
B) a less severe presentation of the genetic condition.
C) multiple, distinct genetic disorders.
D) sterility.
Answer: B
Explanation: Mosaicism, the presence of two or more cell lines with different karyotypes, often
results in a milder phenotype than if all cells carried the abnormality, as the proportion and
distribution of affected cells can vary.
6. The predominant etiology of Down syndrome is:
A) paternal nondisjunction.
B) a balanced translocation in the mother.
C) maternal nondisjunction.
D) a balanced translocation in the father.
Answer: C
Explanation: The vast majority of Down syndrome cases (about 95%) are caused by maternal
nondisjunction, specifically an error in the separation of chromosome 21 during oogenesis.
7. Which factor is most strongly correlated with an increased risk of a Down syndrome pregnancy?
A) In-utero exposure to environmental mutagens
B) Advanced paternal age
Practice Questions & Answer Explanations
Description:
Master your Pathophysiology Exam 1 with this comprehensive 2026 study guide featuring
essential practice questions across genetics, cellular injury, and immunology. Our targeted
review covers key topics including karyotypes, inheritance patterns, adaptive cell changes,
inflammatory response, and immune system function with detailed answer explanations.
Each question is designed to test your clinical reasoning and help you identify knowledge gaps.
Perfect for nursing and medical students preparing for midterms or finals, this resource provides
the strategic practice you need to excel. Get exam-ready faster
Download your ultimate pathophysiology study companion now!
, Pathophysiology Exam 1 Review: Questions & Explained Answers
(2026)
1. What term describes a systematized arrangement of chromosomes from a single cell, used for
genetic analysis?
A) Metaphase spread
B) Autosomal array
C) Karyotype
D) Anaphase distribution
Answer: C
Explanation: A karyotype is the standardized organization of an individual's chromosomes,
photographed during metaphase, and arranged in pairs by size and structure, which is
fundamental for diagnosing genetic disorders.
2. The failure of paired chromosomes to segregate properly during meiotic cell division is known
as:
A) Aneuploidy
B) Nondisjunction
C) Polyploidy
D) Anaplasia
Answer: B
Explanation: Nondisjunction is the specific error in meiosis where homologous chromosomes
or sister chromatids fail to separate, leading to gametes with an abnormal number of
chromosomes.
3. A body cell that possesses an irregular number of chromosomes, not an exact multiple of the
haploid set, is classified as:
A) an aneuploid cell.
B) a euploid cell.
C) a polyploid cell.
D) a haploid cell.
Answer: A
Explanation: Aneuploidy refers to a somatic cell having an abnormal number of chromosomes,
, such as 45 or 47, rather than the normal 46 in humans, which is distinct from euploidy (normal
number) or polyploidy (multiple complete sets).
4. A genetic analysis of a stillborn fetus reveals a total of 92 chromosomes. What is the correct term
for this condition?
A) Euploidy
B) Triploidy
C) Tetraploidy
D) Aneuploidy
Answer: C
Explanation: A chromosome count of 92 represents four sets of chromosomes (4n), which is
termed tetraploidy. This is typically incompatible with life and a cause of miscarriage.
5. An individual with chromosomal mosaicism may typically present with:
A) being an asymptomatic carrier.
B) a less severe presentation of the genetic condition.
C) multiple, distinct genetic disorders.
D) sterility.
Answer: B
Explanation: Mosaicism, the presence of two or more cell lines with different karyotypes, often
results in a milder phenotype than if all cells carried the abnormality, as the proportion and
distribution of affected cells can vary.
6. The predominant etiology of Down syndrome is:
A) paternal nondisjunction.
B) a balanced translocation in the mother.
C) maternal nondisjunction.
D) a balanced translocation in the father.
Answer: C
Explanation: The vast majority of Down syndrome cases (about 95%) are caused by maternal
nondisjunction, specifically an error in the separation of chromosome 21 during oogenesis.
7. Which factor is most strongly correlated with an increased risk of a Down syndrome pregnancy?
A) In-utero exposure to environmental mutagens
B) Advanced paternal age
