The Hardy-Weinberg principle describes: MCQ with Answer and Explanation

The Hardy-Weinberg principle describes:
A. The origin of life
B. The genetic equilibrium in a non-evolving population
C. The mechanism of natural selection
D. The process of speciation
Answer: Option B
Solution (By JKSSB Mock Tests)
The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of evolutionary influences (like mutation, selection, gene flow, genetic drift, and non-random mating). It describes a theoretical, non-evolving population (genetic equilibrium) and provides a mathematical baseline (p2 + 2pq + q2 = 1) to measure evolutionary change.

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Practice More Biology Questions

Question #1
The salivary gland located below the tongue is the:
A. Lacrimal gland
B. Submandibular gland
C. Parotid gland
D. Sublingual gland

Correct Answer: Option D


Explanation:
The sublingual glands are the smallest of the three paired salivary glands, located under the tongue. The parotid is near the ear, submandibular under the jaw.

This question belongs to: Science Biology
Question #2
Which of the following is an example of innate immunity?
A. Antibodies produced after vaccination
B. Physical barriers like skin and mucous membranes
C. Passive immunity from mother's milk
D. Memory T cells

Correct Answer: Option B


Explanation:
Innate immunity is the non-specific, inborn defense mechanism present from birth. It includes physical barriers (skin, mucous membranes), physiological barriers (stomach acid, tears), cellular barriers (neutrophils, macrophages), and cytokine barriers (interferons). Antibodies and memory cells are part of acquired (adaptive) immunity.

This question belongs to: Science Biology
Question #3
Deficiency of which vitamin causes night blindness?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin B₁

Correct Answer: Option A


Explanation:
Vitamin A (retinol) is essential for the synthesis of rhodopsin, the visual pigment in rod cells responsible for low-light vision. Deficiency leads to night blindness (nyctalopia) and, if severe, xerophthalmia and permanent blindness. Vitamin B₁ deficiency causes beriberi, C scurvy, D rickets.

This question belongs to: Science Biology