DNA, Genes & Genetics MCQs with Answers

A fruit fly population has a gene with two alleles, A1 and A2. Tests show that 70% of the gametes produced in the population contain the A1 allele. If the population is in Hardy-Weinberg equilibrium, what proportion of the flies carries both A1 and A2?

• A.0.42
• B.0.49
• C.0.21
• D.0.09

GMO cheese requires a clotting agent produced by using which one of the following enzymes?

• A.Chymosin
• B.Pepsin
• C.Rennin
• D.Trypsin

Gene mutation takes place in ?

• A.Cytoplasm
• B.Ribonucleic acid (RNA)
• C.Ribosomes
• D.Deoxyribonucleic acid (DNA)

Biological species concept depends upon for determining species boundaries?

• A.Morphological similarity
• B.Gene flow
• C.Geographic isolation
• D.Ecological niche

Which one of the following diseases is genetically linked?

• A.Colour blindness
• B.Tuberculosis
• C.Malaria
• D.Typhoid

Which of these evolutionary agents is most consistent at causing populations to become better suited to their environments over the course of generations?

• A.Genetic drift
• B.Natural selection
• C.Gene flow
• D.Mutation

Genetically modified organisms help humans in _?

• A.Increasing food production and resistance to diseases
• B.Decreasing soil fertility and crop yield
• C.Spreading infectious diseases among plants
• D.Reducing nutritional value of crops

Natural selection is most nearly the same as _?

• A.Differential reproductive success
• B.Survival of the weakest
• C.Artificial selection
• D.Random genetic mutation

Population having no gene flow is said to be _?

• A.Migratory
• B.Endemic
• C.Endangered
• D.Isolated

According to Darwin, the main force behind evolution is ?

• A.Use and disuse of organs
• B.Mutation
• C.Genetic drift
• D.Natural selection