Lesson 9 - Inheritance And Genetics

Question 1

All humans share 99.99% of DNA. True or false?

Answer 1

True

Question 2

What is genetics?

Answer 2

Genetics is the study of how characteristics (eye colour, hair type, and height) are passed down freom parents to their children.

Question 3

In which part of the cell does DNA stay?

Answer 3

Nucleus

Question 4

What does a DNA molecule consist of?

Answer 4

It consists of 2 parallel strands of DNA that wind around each other like a twisted ladder.

Question 5

All human body cells have 23 pairs of chromosomes, true or false?

Answer 5

True

Question 6

Can genes in your body determine your physical appearance?

Answer 6

Yes, they can.

Question 7

Name an example of a dominant characteristic. (Eye colour)

Answer 7

Brown Eyes.

Question 8

Can genetic variation be changed by the ewnvironment?

Answer 8

No

Question 9

What is environmental variation?

Answer 9

It is the differences in traits caused by the world around us, and not from our genes.

Question 10

What is an eye colour that is recessive?

Answer 10

Blue eyes.

Question 11

Can a person change a genetically inherited trait? Why or why not?

Answer 11

No, you can’t. You cannot change your DNA. You can change how you look (for example, dyeing your hair a different colour) but that wouldn’t change the sequence inside your DNA.