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
-
Partial lipodystrophy
-
Type II membranoproliferative glomerulonephritis (MPGN II)
-
Hypocomplementemic urticarial vasculitis syndrome (HUVS)
-
Systemic lupus erythematosus (SLE)
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.
-
Marasmus
-
Pellagra
-
Night blindness
-
Galactosemia
D
Correct answer
Explanation
Galactosemia is an inborn error of metabolism inherited as an autosomal recessive trait.
-
mother only
-
father only
-
both the parents
-
None of these
C
Correct answer
Explanation
Tay-Sachï؟½s is an inherited disease. It results when a child receives two defective genes, one from each parent.
-
a recessive allele in homozygous condition
-
a dominant allele in homozygous condition
-
Both (A) and (B)
-
None of these
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.
-
ABCC6
-
CDAN1
-
CDC6
-
CDC73
-
G0s2
E
Correct answer
Explanation
G0/G1 switch gene 2 (G0s2) represents a novel regulator of adipogenesis.
D
Correct answer
Explanation
Edward's syndrome is an abnormality leading to mental deficiency. It is caused by trisomy of chromosome number 18.
-
deficiency disease
-
hereditary disease
-
degenerative disease
-
sex-linked disease
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).
-
homozygous dominant state
-
homozygous recessive state
-
codominant condition
-
heterozygous state
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.
-
Homo species
-
Homo sapiens
-
Rana tigrina
-
Labeo rohita
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.
-
Chromosomes of the father
-
Chromosomes of the mother
-
RH factor of the parents
-
Blood group of the father
-
functional problem
-
type of cancer
-
hormonal imbalance
-
congenital abnormality
D
Correct answer
Explanation
Androgen insensitivity syndrome is a congenital genetic disorder causing genetic males to behave like females, due to the inability to utilise androgens.
-
1 and 2
-
1 and 3
-
2 and 3
-
2 and 4
-
3 and 4
B
Correct answer
Explanation
Yes, it is the correct answer.
-
Reiter's syndrome
-
Lymphogranuloma venereum
-
Inclusion conjunctivitis
-
Trachoma
-
Lymphogranuloma venereumis
A
Correct answer
Explanation
Reiter's syndrome is a triad of symptoms that include conjunctivitis, polyarthritis and genital inflammation. The disease is associated with HLA-B27.
-
Prematurity
-
Autosomal dominant inheritance
-
Autosomal recessive inheritance
-
Congenital rubella
-
Hyperbilirubinaemia
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.
-
Turner’s syndrome
-
AIDS
-
Sickle cell anaemia
-
Erythroblastosis foetalis
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).