Cloning: Copying Life Through Asexual Reproduction — Reading Comprehension

Cloning is a scientific process that creates an exact copy of an organism. This process is a real-world example of asexual reproduction, where only one set of genetic material is used to produce a new organism. The result is a clone, which has the exact same DNA as the original.

In nature, some organisms clone themselves. Bacteria, certain plants, and even some animals like hydras and starfish can reproduce this way. Scientists have learned how to clone in the lab, too. In 1996, scientists in Scotland made history by cloning a sheep named Dolly, the first mammal cloned from an adult cell. Dolly was genetically identical to the sheep that donated the DNA used to create her.

Clones made through asexual reproduction have no genetic variation. Since they come from a single parent, their traits are exactly the same. This can be useful in farming and medicine. For example, farmers might clone a plant that produces a large amount of fruit, ensuring the same high-quality results in every crop.

However, lack of variation can be risky. If all clones have the same DNA, they might also share the same weaknesses. A single disease or environmental change could wipe out an entire population.

Cloning shows both the power and the limitations of asexual reproduction. It allows for exact copies of living things, but it also reminds us of the value of genetic diversity.

Fun Fact: Dolly the sheep lived for six years and even gave birth to six lambs, proving that cloned animals can grow and reproduce like any other!

What is cloning?

Which type of reproduction does cloning use?

What made Dolly the sheep special?

What kind of DNA do clones have?

Why might cloning be useful in farming?

What is one danger of cloning?

What is the main idea of the passage?

If a cloned plant is attacked by a disease, what may happen to its clones?