Year 8 inheritance

• Science
• Lower Secondary (Key Stage 3)

Year 8 inheritance

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How many chromosomes does a sperm cell have?

1. 21
2. 22
3. 23
4. 46

What are genes?

1. Parts of a cell.
2. Parts of a sex cell.
3. Sections of alleles that control characteristics.
4. Sections of chromosomes that control characteristics.

What are different versions of the same genes known as?

1. Alleles
2. Alkali
3. Aleles
4. Alkaline

Dominant alleles need ____ copy/copies to show.

1. 4
2. 3
3. 2
4. 1

Which eye colour is dominant blue or brown?

1. Blue
2. Brown

How many copies of recessive alleles do you need?

1. 1
2. 2
3. 3
4. 4

Brown is dominant, which of these would have brown eyes?

1. BB
2. Bb
3. bB
4. bb

Blue is recessive, which of these would have brown eyes?

1. BB
2. Bb
3. bB
4. bb

The allele Y causes yellow petals
and y causes green petals.
A flower has Yy, explain what colour the petals are.

Give example of variation in one type of speicies

What is adaptation?
Give examples

How have arctic foxes adapted to their habitat?