In gel electrophoresis, DNA is separated based on 1. The number of species represented in the DNA sample
2. The size of the DNA fragments
3. The size of the cell from which the DNA was removed
4. The length of the restriction site on the DNA strand

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.