JAMB Biology 2019 Objective — Question 5

Question 5 of 40 from the Joint Admissions and Matriculation Board (JAMB) Biology 2019 Objective paper, with the correct answer and a full explanation.

The process which ensures that the chromosome number for each species of organisms remains constantly from generation to generation is called

A. oogenesis
B. fusion
C. mitosisCorrect
D. meiosis

Explanation

Meiosis produces daughter cells with half the parent's chromosome number (reductional division), which is restored at fertilization, keeping the species' chromosome number constant across generations. (Note: the source key states the answer as (c) mitosis; biologically this role is typically attributed to meiosis — flagged as a possible key inconsistency.)

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