Animal vs. Human Cloning

Why have we been able to clone animals and not humans?

The First Cloned Mammal, Dolly the Sheep

On July 5, 1996 in Scotland, United Kingdom, a breakthrough occurred. The very first mammal was cloned by an adult somatic cell by a process of nuclear transfer, Dolly the sheep. Some even call her a miracle. However, what most people don't know is that she died very young because of a progressing lung disease. Her death soon posed a question to many scientists, "Is cloning safe? Is it really worth it?"

Many More

Since Dolly scientists have been able to clone many animals. These include, the first tadpole (1952) and other mammals including cows, goats, and mice. The practice of cloning animals is not a new phenomenon it has been around for about 64 years. The concept of Human Cloning, however, is still very new to us. No scientist has successfully cloned a human, and there are many reasons why.
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Why Haven't we Cloned Human yet?

There are many reasons why we have not cloned humans yet. For example, the process of finding the eggs is extremely difficult and time consuming. You see, if you want to have a successful clone you must have an egg[cell] and a donor cell. Scientists have to remove the nucleus from the egg and replace it with the nucleus of the donor cell. However to have enough eggs to perhaps have a successful clone, scientists would have to find enough women who are willing to undergo 1 month of hormone treatment, then go through surgery to extract the eggs. Therefore, scientists haven't had enough human egg cells to produce an effective clone. Also, ethical reasons have prevented scientists from cloning humans. This is because animal cloning has an enormous failure rate (only 1 out of 100 cloning attempts have resulted in a viable animal.) Additionaly, cloned animals have very poor health, some have abnormally large organs. They die off quickly or have to be euthanized. Because of these reasons, many U.S. states have laws banning or only allowing certain types of cloning, (ex. Therapeutic cloning)

Works Cited:

Tsai, Michelle. "Why Is It so Hard to Clone a Human?" Slate Magazine, 12 Nov. 2007. Web. 04 Dec. 2015

Dovey, Dana. "Human Cloning: Just Because We Haven't Doesn't Mean We Can't." Medical Daily. N.p., 26 June 2015. Web. 10 Jan. 2016.

Rafael, Joanna. "10 Weird And Fascinating Facts About Clones." Blisstree RSS. N.p., n.d. Web. 10 Jan. 2016.

Picture Sources:

"Raw Egg." Wikimedia. N.p., n.d. Web. 10 Jan. 2016.

"101-dalmations-dog-cloning-in-south-korea." N.p., n.d. Web. 10 Jan. 2016.

"US-Navel-Orange." Eastcoastimpex. N.p., n.d. Web. 10 Jan. 201