MCQ on Hardy Weinberg Law: Biology is one of the most important and vital sections in NEET. It includes theories, descriptions, discoveries, diagrams, definitions, explanation of differences and relations. Most of the concepts covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12. Other related sources make up for the rest of the syllabus.

In this post we are providing you MCQ on Hardy Weinberg Law, which will be beneficial for you in upcoming NEET, AIIMS, JIPMER, PGIMER, CBSE Board, ICSE Board, Class 12th, 11th.

MCQ on Hardy Weinberg Law

Q1. 25 individuals in a population are homozygous dominant, then the individuals that are expected to be homozygous recessive are ________.
a) 100
b) 75
c) 50
d) 25

Q2. Which condition is essential for a population to be in the Hardy-weinberg equillirbirum ?
a) random mating
b) no mutations
c) large population
d) all of these

Q3. A sampled “a” population has 36% of homozygous recessive genotype (aa). Then the frequency of allele “a” is ________.
a) 0%
b) 20%
c) 60%
d) 70%

Q4. Which statement describes the Hardy-Weinberg law the best ?
a) it is impossible to predict expected allele frequencies mathematically
b) in large populations, dominant alleles become more prevalent
c) allele frequency changes over a period of time in a large population
d) mechanism of inheritance in a large population does not change allele frequency

Q5. Consider a population of sheep to be in Hardy-Weinberg equilibrium. The allele for black wool(w) has an allele frequency of 0.81 while the allele for white wool(W) has an allele frequency of 0.19. Then the percentage of heterozygous individuals in the population is ________.
a) 4%
b) 15% 
c) 31%
d) 66%

Q6. A gene locus has two alleles A and a. If the frequency of dominant allele A is 0.4, then the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population is ________.
a) 0.16(AA); 0.48(Aa); 0.36(aa)
b) 0.16(AA); 0.24(Aa); 0.36(aa)
c) 0.16(AA); 0.36(Aa); 0.48(aa)
d) 0.36(AA); 0.48(Aa); 0.16(aa)

Q7. In the Caucasian population of the US, 1 in 2500 babies is affected by a recessive condition – cystic fibrosis. In this population, the frequency of the dominant allele is ________.
a) 0.02
b) 0.36
c) 0.54
d) 0.98

Q8. This is true of the population which are included in Hardy-Weinberg equilibrium.
a) entities migrate constantly
b) populations should be limited and small
c) mating is random
d) process of natural selection is occurring

Q9. 360 out of 1000 individuals in a population have a genotype of AA while 480 have Aa genotype. The rest 160 belong to aa. Frequency of allele A in this population is ________.
a) 0.7 
b) 0.6
c) 0.5
d) 0.4

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