Where do genes come from?
Have you ever wondered why you have the same eye colour as your biological father or the same hair colour as your biological mother?
It’s because you inherit your genes from your parents.
The instructions necessary for you to grow throughout your life are passed down from both of your biological mother and your biological father. You get half of the information from each parent, which makes you related to them both but identical to neither. When you inherit genes from your parents you get two versions of each gene, one from your biological mother and one from your biological father.
Inheritance is a process of transfer of biological information from one generation to other
Why are you different from your siblings?
The reason you and your siblings are different is because your biological mother and biological father have two versions of each gene, one from each of their parents.
When genes are passed down generations, each biological parent only passes down one copy of each gene to their child, and it is completely random which one this is. This random inheritance of copies of all 20,000 genes a person leads to both similarities and differences between family members. About 50% of gene copies will be shared between siblings. Identical twins are the only siblings that share 100% of their gene copies.
