Learning objectives – to learn how DNA is present in humans and how that
reproduction occurs in humans Learn about why variation occurs in organisms
Organisms of the same species will have many differences.
This is known as variation. Variation simply occurs due to the different genes
we possess. There are two different types of variation, environmental and
Genetic variation occurs due to the different genes we get from our parents.
The genes we get from parents are due to random chance so no two offspring
will be the same, unless you are a twin!!!
In humans we get half of our genetic information for our mother and half from
our father, which is why we look like our parents The characteristics that are
determined by genetics are characteristics such as eye color, height, blood
Environmental variation occurs due to the differences in the environment we
live in. The characteristics influenced by the environment are weight or
sometimes even height.
Both determine the majority of your characteristics. A prime example of this is
height as this can be determined by your nutrition but also can be determined