Why Do Humans Have 46 Chromosomes And Chimps Have 48

Humans have 46 chromosomes, whereas chimpanzee, gorilla, and orangutan have 48. This major karyotypic difference was caused by the fusion of two ancestral chromosomes to form human chromosome 2human chromosome 2Chromosome 2 is one of the twenty-three pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 2 is the second-largest human chromosome, spanning more than 242 million base pairs and representing almost eight percent of the total DNA in human cells. › wiki › Chromosome_2Chromosome 2 – Wikipedia and subsequent inactivation of one of the two original centromeres (Yunis and Prakash 1982)

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