A study on eye color was performed at an elementary school. The allele for brown
ID: 211465 • Letter: A
Question
A study on eye color was performed at an elementary school. The allele for brown eyes is dominant over the allele for blue eyes. Using the data given, what is the number of students in the 2000 sample that was taken that are heterozygous assuming the group is in Hardy-Weinberg equilibrium? 1995 910 50 1000 160 Select one O a. 210 b. 320 O c. 480 O d. 640 In a population of cats that is in Hardy-Weinberg equilibrium, 36% of the individuals have long hair, a recessive trait what is the frequency of the dominant allele in the population? Select one O a 0.2 b. 0.4 O c. 0.6 O d. 0.8 A small number of individuals establishes a new population in a new area. This population then undergoes genetic drift. This situation is known as Select one a genetic bottleneck b. survival of the nittest c. natural selection d founder effectExplanation / Answer
As per Hardy-Weinberg Equilibrium, let
p = Frequency of Dominant Allele
q = Frequency of Recessive Allele
Also p + q = 1
Now,
p2 = Frequency of Homozygous Dominant Genotype
2pq = Frequency of Heterozygous Dominant Genotype
q2 = Frequency of Homozygous Recessive Genotype
ANSWER 1.
q2 = Frequency of Homozygous Recessive Genotype = 160/1000
Hence, q = 4/10
Hence, p= 1-q = 6/10
Hence, 2pq = Frequency of Heterozygous Dominant Genotype = 2 * (4/10) * (6/10) = 48/100 or 480/1000
Answer c. 480
ANSWER 2.
q2 = Frequency of Homozygous Recessive Genotype = 36/100
Hence, q = 6/10
Hence, p = 1-q = 4/10
Hence, p = Frequency of Dominant Allele = 4/10 = 0.4
Answer b. 0.4
ANSWER 3.
When a small number of individuals establishes a new population in a new area and then subsequently undergoes genetic drift it leads to a small representative gene pool establishing a population there and loss of a few species there, translates to a great genetic loss in the long run. This entire process is collectively called:
Answer d. founder effect
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