Biology

Human Genetics and Disorders

882 Questions

Human Genetics and Disorders covers the inheritance patterns, genetic mutations, and molecular basis of hereditary diseases. Topics include sex-linked traits, cancer genetics, and metabolic disorders. This section tests knowledge critical for biology exams and general science papers.

Genetic mutationsInherited disordersCancer geneticsGenetic testingMendelian inheritance

Human Genetics and Disorders Questions

Multiple choice

What is the primary cause of X-linked agammaglobulinemia (XLA)?

  1. Mutation in the Bruton's tyrosine kinase (BTK) gene

  2. HIV infection

  3. Cancer

  4. Malnutrition
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

X-linked agammaglobulinemia (XLA) is caused by a mutation in the Bruton's tyrosine kinase (BTK) gene, which is responsible for the development and function of B cells.

Multiple choice

What is the primary cause of Wiskott-Aldrich syndrome (WAS)?

  1. Mutation in the WAS gene

  2. HIV infection

  3. Cancer

  4. Malnutrition
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Wiskott-Aldrich syndrome (WAS) is caused by a mutation in the WAS gene, which is responsible for the production of a protein involved in the regulation of immune cell function.

Multiple choice

Which genetic disorder is characterized by the presence of an extra copy of chromosome 21?

  1. Down Syndrome

  2. Turner Syndrome

  3. Klinefelter Syndrome

  4. Sickle Cell Anemia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Down Syndrome, also known as Trisomy 21, is a genetic disorder caused by the presence of an extra copy of chromosome 21, leading to developmental and physical abnormalities.

Multiple choice

Which genetic disorder is characterized by the presence of an extra X chromosome in males?

  1. Down Syndrome

  2. Turner Syndrome

  3. Klinefelter Syndrome

  4. Sickle Cell Anemia
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Klinefelter Syndrome is a genetic disorder caused by the presence of an extra X chromosome in males, leading to developmental and physical abnormalities.

Multiple choice

Which genetic disorder is characterized by the presence of sickle-shaped red blood cells?

  1. Down Syndrome

  2. Turner Syndrome

  3. Klinefelter Syndrome

  4. Sickle Cell Anemia
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sickle Cell Anemia is a genetic disorder characterized by the presence of sickle-shaped red blood cells, leading to anemia, pain crises, and various health complications.

Multiple choice

Which genetic disorder is characterized by the presence of an extra Y chromosome in males?

  1. Down Syndrome

  2. Turner Syndrome

  3. Klinefelter Syndrome

  4. XYY Syndrome
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

XYY Syndrome is a genetic disorder characterized by the presence of an extra Y chromosome in males, typically leading to subtle physical and behavioral differences.

Multiple choice

Which type of research involves studying the genetic makeup of individuals to identify genetic variations associated with diseases?

  1. Genome-wide association study (GWAS)

  2. Meta-analysis

  3. Observational study

  4. Clinical trial
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

GWAS is a large-scale study that examines the entire genome to identify genetic variations that are associated with specific diseases or traits.

Multiple choice

Which of the following is NOT a genetic factor that has been linked to aggression?

  1. High levels of testosterone

  2. Low levels of serotonin

  3. A history of childhood abuse

  4. A genetic predisposition to violence
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A history of childhood abuse is an environmental factor that can contribute to aggression, but it is not a genetic factor.

Multiple choice

What is the name of the first successful gene therapy treatment, and what disease did it target?

  1. ADA deficiency, 1990

  2. Cystic fibrosis, 1993

  3. Sickle cell anemia, 1998

  4. Huntington's disease, 2001
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The first successful gene therapy treatment was performed in 1990 to treat a young girl with ADA deficiency, a rare genetic disorder. The treatment involved inserting a healthy copy of the ADA gene into the girl's T cells.

Multiple choice

What is the role of genetics in substance abuse?

  1. Genetics play a role in the development of substance use disorders.

  2. Genetics do not play a role in the development of substance use disorders.

  3. The role of genetics in substance abuse is unknown.

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Genetics play a role in the development of substance use disorders. Studies have shown that people who have a family history of substance abuse are more likely to develop a substance use disorder themselves.

Multiple choice

Which of the following is an example of a recessive trait in humans?

  1. Cystic Fibrosis

  2. Huntington's Disease

  3. Sickle Cell Anemia

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cystic Fibrosis, Huntington's Disease, and Sickle Cell Anemia are all examples of recessive traits in humans, meaning that both copies of the gene must carry the recessive allele for the trait to be expressed.

Multiple choice

Which of the following is an example of a codominant trait?

  1. ABO Blood Groups

  2. Sickle Cell Anemia

  3. Cystic Fibrosis

  4. Huntington's Disease
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

ABO Blood Groups are an example of codominance, where both alleles are expressed in the phenotype, resulting in multiple distinct phenotypes.

Multiple choice

Which of the following is an example of a sex-linked trait?

  1. Hemophilia

  2. Cystic Fibrosis

  3. Huntington's Disease

  4. Sickle Cell Anemia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hemophilia is an example of a sex-linked trait, as the gene responsible for the disorder is located on the X chromosome.

Multiple choice

Which of the following is not a common childhood metabolic disease?

  1. Phenylketonuria

  2. Cystic fibrosis

  3. Gaucher disease

  4. Niemann-Pick disease
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cystic fibrosis is a genetic disorder that affects the lungs, digestive system, and other organs. It is not a metabolic disease.

Multiple choice

What is the most common type of Gaucher disease?

  1. Type 1

  2. Type 2

  3. Type 3

  4. Type 4
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Type 1 Gaucher disease is the most common type. It is characterized by an accumulation of Gaucher cells in the spleen, liver, and bone marrow.