Anorexia - Genetics

Question 1

What are monozygotic twins?

Answer 1

• Monozygotic twins develop from the same fertilised egg and that splits into two.
• These twins are the same sex and share the same genes. They are genetically identical.

Question 2

How much DNA do MZ twins share?

Answer 2

• 100% of their DNA

Question 3

What are dizygotic twins?

Answer 3

• Result from the fertilisation of two separate eggs with two different sperms during the same pregnancy. - They may not have the same sex or appearance. They are not genetically identical.

Question 4

How much DNA do DZ twins share?

Answer 4

• They share about 50% of their DNA.

Question 5

What is a concordance rate?

Answer 5

• The extended at which both twins share the same characteristics. Percentage extent at which both twins share the same characteristics.

Question 6

What is a heritability rate?

Answer 6

• It is the statistical measurement of how genes influence individual variations observed within a population.
  Adoption studies help separate DNA and environment.
• Twins share the same environment.