Write the name of the sheep which was the first successfully cloned at the end of the 20^th century.

The process of producing many identical organisms or clones is called:

Genes are made from a substance called:

Which part of the cell controls the growth and development of the cell?

The structure of a DNA molecule appears as:

What are the sex cells of an organism?

Who studied the structure of molecules by firing X-rays? 

Clone can occur naturally through a process called:

In humans, there are two type of sex chromosomes, called X and Y chromosomes. A person with two X chromosomes is called:

How many chromosomes are there in human body?