DNA, Genes & Genetics MCQs with Answers

Chances for a son or daughter in each birth is

• A.1:1 between son and daughter
• B.3:1 in favor of son
• C.3:1 in favor of daughter
• D.2:1 in favor of son

The molecular model of DNA which suggests the basic mechanism of replication was proposed by?

• A.Rosalind Franklin and Maurice Wilkins
• B.Gregor Mendel and Thomas Morgan
• C.James Watson and Francis Crick
• D.Charles Darwin and Alfred Wallace

Chromosomes are made up of _?

• A.DNA and Proteins
• B.RNA and Lipids
• C.DNA and Carbohydrates
• D.RNA and Proteins

What is the study of heredity called?

• A.Genetics
• B.Cytology
• C.Embryology
• D.Ecology

Which of the following increases variation within a gene pool?

• A.Natural selection
• B.Genetic drift
• C.Gene mutation
• D.Inbreeding

Which combination of chromosomes is present in females?

• A.XX
• B.XY
• C.YY
• D.XO

Structure of DNA was discovered by James Watson and Francis Crick in _?

• A.1951
• B.1955
• C.1953
• D.1957

Sickle cell anaemia results from?

• A.Single amino acid substitution in the haemoglobin molecule
• B.Complete absence of haemoglobin in red blood cells
• C.Deficiency of iron in the bone marrow
• D.Mutation in the white blood cell membrane

Which term is the most suitable to describe a polyploid having its sets of chromosomes derived from different species?

• A.Autopolyploidy
• B.Allopolyploidy
• C.Aneuploidy
• D.Euploidy

The equation for Hardy-Weinberg equilibrium is ?

• A.P² − 2pq + q² = 1
• B.P² + pq + q² = 1
• C.P + 2pq + q = 1
• D.P² + 2pq + q² = 1