https://padlet.com/s836041/7yikd8pifju7 Chromosomal based en-us 2019-03-12 17:40:14 UTC 2019-05-14 16:23:27 UTC hello@padlet.com s836041 https://padlet.com/s836041/7yikd8pifju7/wish/340553030 Tetrasomy is a rare disorder, and it does not happen very often. It affects about 250 families world wide. ]]> 2019-03-12 17:49:42 UTC https://padlet.com/s836041/7yikd8pifju7/wish/340553030 s836041 https://padlet.com/s836041/7yikd8pifju7/wish/340553825  Tetrasomy is usually not inherited. It occurs as a random event during the formation of reproductive cells. Most of the affected  people have no history of the disorder in their family. ]]> 2019-03-12 17:51:08 UTC https://padlet.com/s836041/7yikd8pifju7/wish/340553825 s836041 https://padlet.com/s836041/7yikd8pifju7/wish/359986356 2019-05-14 16:20:28 UTC https://padlet.com/s836041/7yikd8pifju7/wish/359986356