Selected MCQ

Current Question
In a large, randomly mating population under Hardy–Weinberg equilibrium, 9% of individuals display a recessive trait. What percentage are heterozygous carriers?
  • A. 18%
  • B. 42%
  • C. 9%
  • D. 81%
Correct Answer: B
Explanation:
If q²=0.09, then q=0.30 and p=0.70. Heterozygous frequency = 2pq = 2(0.70)(0.30) = 0.42 or 42%.
Related Question 1
Which of the following techniques compares short tandem repeat (STR) regions among individuals for identification?
  • A. Western blot
  • B. DNA microarray
  • C. DNA fingerprinting
  • D. Northern blot
Correct Answer: C
Explanation:
DNA fingerprinting analyzes highly polymorphic regions, especially STRs, to distinguish individuals (used in forensics and paternity testing).