No there shouldn't be a hyphen. Fingernails and toenails are full words.
All cells have DNA in them. If you take cells from your mouth and finger they would have the same genetic code.
No Nott Realy
The Egyptians covered their fingernails and toenails with gold.
Yes, all the parts of the same body have identical DNA (with the exception of very rare people known as chimeras, formed when the embryos of fraternal twins merge and the cells of what would have been two different persons intermingle in the body of one person). However the cells that make up fingernails and toenails are dead and there may be some degradation of their DNA.
a protein that makes up finger and toenails
You clearly have to much free time!
Finger nails.
if you don't take care of your finger and toenails they can grow in and get infected, if that happens you have to go to the doctor.
DNA finger printing- The Tracking of DNA finger prints through your fingers and hands and understanding who did the crime so they tell bye looking for finger prints.
A cow's hooves, though thicker, tougher and stronger than a human's finger- or toenails, are made of the same sort of "material" that makes toenaisl: keratin.
Toe and finger nails are made of kerotin as are animal hooves