Before revision: In October 2015, two independent studies showed that elephants have 20 copies of tumor suppressor gene TP53 in their genome , where humans and other mammals have only one.
After revision: African, Asian elephants have 15 to 20In October 2015, two independent studies showed that elephants have 20 copies of tumor suppressor gene TP53 in their genome , where humans and other mammals have only one.