NEET Zoology - MCQ Practice Questions

A population of beetles shows industrial melanism. Dark beetles increased from 5% to 95% in 50 years in polluted areas. What type of selection is most likely operating?

Which statement about mutations is correct?

In a population, the allele frequency of 'a' is 0.4 and 'A' is 0.6. If the population is in Hardy-Weinberg equilibrium, what is the expected frequency of heterozygotes?

A frameshift mutation occurs in the middle of a gene. What is the most likely consequence?

A silent mutation in the third codon position of a gene coding for protein synthesis most likely occurs due to:

In a testcross of a dihybrid (AaBb) with a homozygous recessive (aabb), if the offspring ratio deviates from 1:1:1:1, it indicates:

Peppered moths in industrial England showed rapid evolution from predominantly light-colored to dark-colored populations. This is an example of:

A mutation converts an amino acid codon (GUU for valine) to a stop codon (UAA). This type of mutation would most severely affect the protein by:

In a population of 1000 individuals, if a recessive genetic disorder appears in 16 individuals (aa genotype), and assuming Hardy-Weinberg equilibrium, what is the frequency of the recessive allele?

In a cross between two heterozygous individuals (Aa × Aa), if the homozygous dominant genotype (AA) is lethal and dies in utero, the surviving offspring ratio would be: