DNA , the genes and chromosomes
When we were conceived we received 23
chromosomes from each of our parents. Each
parent gave a sex cell (called a gamete) which
joined together to form a “zygote”. ( a zygote
is the moment of conception and is the very
first cell). Inside this cell there were 46
chromosomes (23 + 23) in the nucleus. Each
of these chromosomes have many “genes” in
them.
These genes determine many things about us;
for example 1. What colour eyes we have 2.
Whether we can roll our tongue 3. Certain
aspects of our personality.