Chapter 14.2 Human Chromosomes

Human Genes and Chromosomes Chromosomes 21 and 22 are the smallest human autosomes Chromosome 22 has about 43 million DNA base pairs Chromosome 21 has about 32 million base pairs Chromosome 22 has about 545 different genes Genetic disorders tat occur on chromosome 22 are leukemia and neurofibromatosis a tumor causing disease There is also a long stretch of repeating DNA that does not code for proteins

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