Master NEET Zoology with topic-wise questions. Tailored for NEET students, these questions strengthen your Biology preparation.
Genetic drift, a significant force in evolution, exerts varying effects depending on population size. Which of the following accurately describes the impact of genetic drift on small populations?
It has minimal impact as allele frequencies remain relatively stable.
It increases genetic diversity by introducing new alleles through random mutations.
It leads to a significant decrease in genetic diversity and can fix alleles, even deleterious ones.
It promotes adaptive evolution by selectively favoring beneficial alleles.
In a population of butterflies, the allele for red wings (R) is dominant over the allele for white wings (r). If 75% of the butterflies have red wings, what is the frequency of the recessive allele (r) assuming the population is in Hardy-Weinberg equilibrium?
0.25
0.5
0.75
1.0
In a population in Hardy-Weinberg equilibrium, the frequency of a dominant allele (A) is 0.6. What is the frequency of heterozygotes (Aa)?
0.36
0.48
0.16
0.64
If a population is in Hardy-Weinberg equilibrium and the frequency of homozygous recessive individuals is 0.09, what is the frequency of the dominant allele?
0.3
0.7
0.09
0.91
A population of wildflowers has two alleles for flower color: red (R) and white (r). If the frequency of the red allele is 0.8 and the population is in Hardy-Weinberg equilibrium, what percentage of the population is expected to be heterozygous (Rr)?
64%
32%
16%
4%
Genetic drift is most likely to have a significant impact on which type of population?
Large and diverse
Small and isolated
Migratory populations
Populations with high mutation rates
In a population in Hardy-Weinberg equilibrium, the frequency of a dominant allele is 0.8. What is the frequency of the homozygous recessive genotype?
0.04
0.16
0.32
0.64
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of other evolutionary influences. This principle is most useful for:
Predicting genotype frequencies
Explaining the origin of new alleles
Describing the process of natural selection
Calculating mutation rates
If a population is in Hardy-Weinberg equilibrium, and the frequency of the homozygous dominant genotype is 0.36, what is the frequency of the heterozygous genotype?
0.16
0.24
0.48
0.64
Which process is primarily responsible for the increase in the frequency of beneficial alleles in a population?
Genetic drift
Gene flow
Mutation
Natural selection
