https://slavyanski.net/sb2020/story.php?title=4-factors-that-have-an-result-on-adult-video-chat-app Chromosome 21 is the smallest human chromosome, spanning about 48 million base pairs (the creating blocks of DNA) and symbolizing 1.5 to two percent of the full DNA in cells. Thu, 01 Sep 2022 04:38:40 UTC en