MCQ on Population Genetics - Hardy Weinberg Equilibrium Problems

1. Approximately 4% of the turtle population in the pond shows the recessive phenotype long nose (nn). What is the frequency of the dominant allele (N) in the population?

(A) 0.16

(B) 0.20

(C) 0.40

(D) 0.32

(E) 0.80

2.  Approximately 4% of the turtle population in the pond shows the recessive phenotype— long nose (nn).  What is the frequency of heterozygotes in the population?

(A) 0.08

(B) 0.24

(C) 0.32

(D) 0.48

(E) 0.64

3. Within the squirrel population at park, 16% show the recessive phenotype of a curled tail (tt). What is the frequency of the dominant allele (T) in the population?

(A) 0.40

(B) 0.16

(C) 0.26

(D) 0.60

(E) 0.32

4. Within the squirrel population at park, 16% show the recessive phenotype of a curled tail (tt).  What is the frequency of heterozygotes in the population?

(A) 0.08

(B) 0.24

(C) 0.36

(D) 0.48

(E) 0.64

5.  In a population, 600 individuals have MM blood group, 300 have MN blood group, and 100 have NN blood group. What will be the frequencies of M and N alleles in this population?

(A) M= 0.79 and N=0.1

(B) M= 0.65and N=0.35

(C) M= 0.30 and N=0.60

(D) M= 0.75 and N=0.25

(E) M= 0.61 and N=0.19

6.The following genotypes are found in a population: AA -70, Aa-50, aa-20

What are the allele frequencies of A and a?

(A) A= 0.08 and a=0.14

(B) A= 0.63and a=0.36

(C) A= 0.32 and a=0.68

(D) A= 0.68 and a=0.32

(E) A= 0.68 and a=0.14

7. ------ affect the HW equilibrium. 

(A) Large population

(B) Cross fertilization 

(C) Diploidy

(D) Natural selection 

8. In a Hardy Weinberg population the individuals with AA genotype have a frequency of 0.49. 

Find out the frequency of heterozygotes in the population if AA, Aa and aa are the only genotypes in the population? 

(A) 0.49 

(B) 0.7 

(C) 0.3 

(D) 0.42

Learn more: 

• Practice more: Hardy Weinberg Equilibrium Problems
• How to solve Hardy Weinberg equilibrium? 
• Calculating Gene frequency

Answers:

1.(E) 0.80

2.(C) 0.32

3. (D) 0.60

3. (D) 0.48

5. (D) M= 0.75 and N=0.25

6. (D) A= 0.68 and a=0.32

7. (D) Natural selection 

8. (D) 0.42