The probable reason for the tinted brown shade in the human epithelial DNA and not the strawberry DNA is that human epithelial DNA is extracted from one's mouth in which there can be many germs that could change the color of the original DNA. Furthermore, in order to avoid these germs from affecting the human epithelial cell DNA greatly, the experimenter is only asked to rinse their mouth with distilled water while in truth, Just a rinse with distilled water does not eradicate all possible germs that could be living in one's cheek cells.However, some probably factors for why the strawberry DNA and the human epithelial DNA were so similar Is because both Dana were extracted using the same methods. For Instance, In both experiments detergent and ethanol were used to separate the DNA from the nucleus and proteins Inside the cells. Thus, although there are many differences and similarities between the strawberry and human epithelial DNA, in the end they both had the characteristic of being standstill and clumpy. There were man's steps to this experiment.
