Which of the following is a true statement about chromosomes?

Question

Quizplus · Accepted Answer

Scientists identify individual chromosomes by number, which is a standard method for distinguishing among the 23 pairs of human chromosomes based on their size, shape, and the pattern of light and dark bands that appear when they are stained and viewed under a microscope. Choices B, C, and D are incorrect because chromosomes can vary in appearance, not all people have two X chromosomes (males typically have one X and one Y), and not all people have two Y chromosomes (this is a condition that does not occur under normal circumstances).

Which of the Following Is a True Statement About Chromosomes