Unit 2: Biological theories

How many pairs of chromosomes do humans have?

• 20
• 21
• 22
• 23

Which letter shows the human is male from their chromosomes?

• X
• Y
• A
• C

What is the name of the syndrome which sees XYY Chromosome?

• Jake's
• John's
• Jacob's
• Josh's

How many does this chromosome abnormality affect?

• 1 in 100
• 1 in 10
• 1 in 10000
• 1 in 1000

Who's defence attempted to use this deficit as excuse for the offence?

• Barry George
• Tim Loot
• Richard Speck
• Charles Bronson

Twin studies are used to study genetic causes...

• True
• False

What are the two names of twins?

• Bigotic and Dizygotic
• Dual Twins and Zygotic
• Monozygotic and Dizygotic
• Monozygotic and Bigotic

How many twins did Lange find were criminal together?

• 10/13 MZ and 2/17 DZ
• 1/10 MZ and 4/17 DZ
• 5/13 MZ and 16/17 DZ
• 13/13 MZ and 1/17 DZ

What percentage of identical twins did Christiansen (1974) find were criminal together?

• 25%
• 30%
• 35%
• 40%

Adoption studies are not used to study genetic links to crime.

• True
• False