NEET Zoology - MCQ Practice Questions

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:

What is the role of GnRH in reproductive health?

In females, the LH surge causes:

Which contraceptive method has the highest efficacy rate in India as per 2024 guidelines?

What is the primary cause of infertility in males in India?

A 25-year-old woman has irregular menstrual cycles with heavy bleeding. What could be a likely cause?

Which of the following is a natural method of family planning?

What is the significance of hCG (human Chorionic Gonadotropin) in pregnancy?

During which phase of the menstrual cycle are FSH levels highest?

Which of the following contraceptive methods has the highest failure rate among barrier methods?

A woman exhibits symptoms of amenorrhea, hirsutism, and obesity. What could be the most likely endocrine disorder affecting her reproductive health?

Which of the following statements about lactation is correct?

At what level of hCG concentration in serum is an ectopic pregnancy typically detected via ultrasound?