Human Inheritance (T3)

Question 1

Female gametes (eggs) contain …. chromosomes?

Answer 1

X chromosomes

Question 2

Male gametes (sperm) contain what chromosomes?

Answer 2

X or Y

Question 3

In human reproduction what chance is there of a fertilised egg becoming a boy or a girl?

Answer 3

50/50

Question 4

What does a biologist mean when they refer to ‘variation’ in living organisms?

Answer 4

The study of differences between different species.

Some characteristics of an organism are affected by the environment.

Some characteristics can only be inherited.

Some characteristics are caused by a combination of environmental and inherited factors.

Question 5

What are the sex chromosomes in male mammals?

Answer 5

X and Y

Question 6

What are the sex chromosomes in female mammals?

Answer 6

X and X

Question 7

Give two examples of characteristics caused by the environment

Answer 7

• the language we use

- whether we have scars

Question 8

Give three examples of inherited characteristics..

Answer 8

• the shape of earlobes
• eye colour
• nose shape

Question 9

Name three examples of characteristics that are affected by both environmental and inherited factors…

Answer 9

• intelligence
• body mass
• height