Which of the following best describes the process of meiosis?
• it is the first stage of mitosis.
• it occurs in all tissues that require growth or replacement.
• it happens in all cells except in the brain and nervous system.
• it is carried out in cells that are involved in sexual reproduction.

The correct answer is D. It is carried out in cells that are involved in sexual reproduction.

Explanation:

Meiosis is a type of cell division in which a mother cell leads to four daughter cells that contain only half of the chromosomes of the original cell and are genetically different from the original cell. Meiosis mainly occurs in cells involved in sexual reproduction in both unicellular and multicellular organisms as this cell division process creates cells with genetic material and half chromosomes (gamete) that can be combined with a gamete from a different parent to create a new organism that contains genetic material of both parents. Thus, the statement that best describes the process of meiosis is "it is carried out in cells that are involved in sexual reproduction".

c

explanation:

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).