Why does chromosome 21 come first before chromosome 22? If chromosome 21 is smaller than chromosome 22, and if the karyogram is arranged from largest to smallest shouldn’t chromosome 22 be first over chromosome 21?

Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN:9781305251052
Author:Michael Cummings
Publisher:Michael Cummings
Chapter6: Cytogenetics: Karyotypes And Chromosome Aberrations
Section: Chapter Questions
Problem 14QP: Variations in Chromosome NumberAneuploidy Describe the process of nondisjunction and explain when it...
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Why does chromosome 21 come first before chromosome 22? If chromosome 21 is smaller than chromosome 22, and if the karyogram is arranged from largest to smallest shouldn’t chromosome 22 be first over chromosome 21?
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