3 Science 3

2. > – observable characteristics that is passed
on from parent to child. It distinguishes you from the
other people.
ex: color of the hair (black hair common to Filipinos),
curly black hair (distinguishes from other Filipinos).
skin color, size of nose, shape of face, color and shape of
eyes, type of hair, kind of body build, or height, smiles can
be inherited, talents like singing, drawing, or dancing,
also bad traits such as diseases (heart problems,
diabetes, and asthma)

3. - a threadlike structure of nucleic acids
and protein found in the nucleus of most living cells,
carrying genetic information in the form of genes. A
chromosome is made up of and organized
into genes. normally contains
is the chemical name for
the molecule that carries genetic instructions in all
living things. The DNA molecule consists of two strands
that wind around one another to form a shape known as
a double helix.

4. - is a unit of heredity which is transferred from
a parent to offspring and is held to determine some
characteristic of the offspring.
"proteins coded directly by genes“
Variation – are the differences between the individuals
in a species. This means that no two members of a
species are identical. Ex.

5. Continuous variation Discontinuous variation
Height Blood group
Weight Hand used to write with
Arm span Eye colour
Head circumference at
birth
Ability to roll tongue
What are types of variation?
More examples