Biology

Human Genetics and Disorders

844 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
  1. Partial lipodystrophy

  2. Type II membranoproliferative glomerulonephritis (MPGN II)

  3. Hypocomplementemic urticarial vasculitis syndrome (HUVS)

  4. Systemic lupus erythematosus (SLE)

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hypocomplementemic urticarial vasculitis syndrome (HUVS) (also called SLE-related syndrome or chronic hypocomplementemic cutaneous vasculitis) is a disorder associated with anti-C1q antibodies that leads to classical pathway activation and chronic decreases in C1, C2, C4 and C3 levels.

Multiple choice
  1. a recessive allele in homozygous condition

  2. a dominant allele in homozygous condition

  3. Both (A) and (B)

  4. None of these

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In human beings a few lethal genes are known which are associated with fatal 'Infantile amourotic idiocy' disease, and is caused by recessive allele in homozygous condition.

Multiple choice
  1. deficiency disease

  2. hereditary disease

  3. degenerative disease

  4. sex-linked disease

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Albinism is an inherited (hereditary) genetic condition caused by mutations in genes involved in melanin production. It is not a deficiency disease (caused by lack of nutrients), degenerative disease (progressive deterioration), or exclusively sex-linked (though some forms can be X-linked).

Multiple choice
  1. homozygous dominant state

  2. homozygous recessive state

  3. codominant condition

  4. heterozygous state

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In sickle cell anemia, individuals with the homozygous recessive state (HbS/HbS) suffer severe, often fatal, medical complications due to the malformation of red blood cells. Heterozygotes (carriers) generally exhibit normal health with resistance to malaria.

Multiple choice
  1. Homo species

  2. Homo sapiens

  3. Rana tigrina

  4. Labeo rohita

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The scientific name for modern humans is Homo sapiens, following the binomial nomenclature system. In this name, 'Homo' represents the genus and 'sapiens' represents the species. Other options like Rana tigrina and Labeo rohita refer to a frog and a fish, respectively.

Multiple choice
  1. Chromosomes of the father

  2. Chromosomes of the mother

  3. RH factor of the parents

  4. Blood group of the father

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Correct option is (1). 

Multiple choice
  1. Prematurity

  2. Autosomal dominant inheritance

  3. Autosomal recessive inheritance

  4. Congenital rubella

  5. Hyperbilirubinaemia

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Inherited causes now account for 50% of all cases of severe sensorineural hearing impairment; 80% are due to single-gene autosomal recessive disorders and 15% to autosomal dominant disorders.

Multiple choice
  1. Turner’s syndrome

  2. AIDS

  3. Sickle cell anaemia

  4. Erythroblastosis foetalis

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mismatching of Rh factor causes Erythroblastosis foetalis or Hemolytic Disease of the Newborn (HDN). This fetal disease ranges from mild to very severe, and fetal death from heart failure (hydrops fetalis) can occur. Mismatching of Rh factor causes Erythroblastosis foetalis or Hemolytic Disease of the Newborn (HDN).