Who discovered that plant chromosomes undergo meiosis and crossing over, establishing physical genetic maps? MCQ with Answer and Explanation

Who discovered that plant chromosomes undergo meiosis and crossing over, establishing physical genetic maps?

A. Thomas Hunt Morgan

B. Charles Darwin

C. Hugo de Vries

D. Gregor Mendel

Answer: Option A

Thomas Hunt Morgan demonstrated chromosome mapping and sex-linked inheritance using Drosophila melanogaster (fruit flies).

This question belongs to: Static General Knowledge Inventions and Discoveries

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Question #1 Report Error

Who discovered the law of planetary gravitation, formalizing that attractive force is inversely proportional to square distance?

A. Isaac Newton

B. Galileo Galilei

C. Robert Hooke

D. Johannes Kepler

Correct Answer: Option A

Explanation:
Sir Isaac Newton published the Universal Law of Gravitation in his monumental work 'Principia Mathematica' in 1687.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #2 Report Error

Who discovered the phenomenon of specific heat capacity and latent heat in thermodynamics?

A. Lord Kelvin

B. Joseph Black

C. Antoine Lavoisier

D. James Joule

Correct Answer: Option B

Explanation:
Scottish chemist Joseph Black discovered latent heat and specific heat, laying foundations for thermodynamic science.

This question belongs to: Static General Knowledge Inventions and Discoveries

Question #3 Report Error

The invention of the common mechanical device known as the modern coin-operated parking meter was patented by whom?

A. James Ritty

B. Walter Hunt

C. Garrett Morgan

D. Carl Magee

Correct Answer: Option D

Explanation:
Carl Magee patented the 'Park-O-Meter' in Oklahoma City in 1935 to regulate downtown vehicle traffic turnover.

This question belongs to: Static General Knowledge Inventions and Discoveries