13 Inheritance 2

What is the scientific word that refers to the differences within a species?

• variation

• characteristics

• features

• inheritance

What causes variation?

• inherited factors only

• environmental factors only

• inherited and environmental factors

Which two characteristics show variation as a result of inherited factors only?

• blood group

• pierced ears

• number of freckles

• natural eye colour

• height

Which two characteristics show variation as a result of environmental factors only?

• blood group

• pierced ears

• Scar

• natural eye colour

• height

Which two characteristics show variation as a result of a combination of both inherited and environmental factors?

• blood group

• pierced ears

• number of freckles

• natural eye colour

• height

Mutations can be negative because

• They can cause cancer

• They can cause birth defects

• They can help an organism thrive in its environment.

• They can affect offspring.

Mutations can benefit humans because they can:

• Cause illness

• Make an organism more suited to live in its environment.

• Make organisms live shorter lives

• Cause organisms to grow extra limbs.

A mutation is defined as:

• A change in the cell's structure

• Anything that changes in an embryo

• Any change in the physical features of a human

• A change in the DNA sequence

B = brown fur  b = white fur
In the Punnett square, what is the probability for white fur? 

• 0%
• 25%
• 50%
• 75%

What is the dominant trait?

• yellow pea seeds
• green pea seeds
• there is no dominant seed
• Jolly green giant