Why do you (and most other species) have two copies of each chromosome?Are these two copies of chromosomes called sister chromatids or homologous chromosomes? What’s the difference between sister chromatids and homologous chromosomes?

Answered: Why do you (and most other species)…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Why do you (and most other species) have two copies of each chromosome?
Are these two copies of chromosomes called sister chromatids or homologous chromosomes? What’s the difference between sister chromatids and homologous chromosomes?

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A chromosome is an organized package of DNA that is found in the nucleus of the cell. Different organisms have different numbers of chromosomes. Humans have 46 chromosomes that is, 23 pairs of chromosomes--22 pairs of numbered chromosomes, called autosomes, and one pair of sex chromosomes, X and Y.

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