Humans Have 23 Pairs of Chromosomes, and Chimps Have 24

question 9

Multiple Choice

Humans have 23 pairs of chromosomes, and chimps have 24 pairs of chromosomes. Which of the following best explains the difference in chromosome number between humans and chimps?

• A) The common ancestor of humans and chimps had 24 pairs of chromosomes. During human evolution, two human chromosomes fused end to end.
• B) In the evolution of chimps, new adaptations resulted from additional chromosomal material.
• C) At some point in evolution, human and chimp ancestors reproduced with each other.
• D) An Error in mitosis in a common ancestor split one chromosome and resulted in the additional pair seen in chimps.

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Definitions:

Lactated Ringer's Solution

is a fluid commonly used for intravenous hydration and electrolyte replenishment in medical settings, especially during surgery.

Normal Saline

A sterile solution of sodium chloride in water, commonly used in medical settings for a variety of purposes, including hydration and wound cleaning.

Metabolic Acidosis

A disturbance in the body's acid-base balance resulting in a lower than normal blood pH due to increased acid or decreased bicarbonate.