Page 3 - Reading Success B3

In your body, genes give instructions to your cells. They tell cells what to do in
everything whether it’s determining when to start puberty or determining the

shape of your nose. Genes affect how you look and act. It can even affect your
health. These genes are unique in each person, and they come from their parents.

Genetics is the study of genes, or heredity how people’s looks and other
qualities are passed down to them from their parents, and even from the

generations before them. Most children look like their parents, right? Through
genetics, we understand the science of why they do. Your dimple, the color of

your eyes, your curly hair is all because of your genes. Even things like talent for
music or drawing can be linked to your heredity. Sometimes people notice other

traits, and make comments like ‘you dance like your father’. Knowing about
genetics can help you understand yourself better. This helps you figure out what

you can change about yourself, and what you can’t.
Unless you have an identical twin, there is not another person on the planet

with a set of genes exactly like yours! Even identical twins differ in many ways.

Main Idea

What is the main idea of this story?

a. the development of people

b. having an identical twin
c. human genetics and heredity

d. when a person starts puberty

6_Reading Success B 3