CGE: Evaluating Data on Phenotypes

Question 1

What is the phenotype influenced by?

Answer 1

Both the environment and genetics - it is not always clear how much it is influenced by each factor.

Question 2

What type of studies can help to determine influences on phenotype?

Answer 2

Twin studies

Question 3

How do twin studies help us determine influences on phenotype?

Answer 3

• Twins are genetically identical so any differences in phenotype must be entirely due to environmental factors.
• If characteristic is similar = genetics plays a more important role.
• If characteristic is different = environment has a larger influence.

Question 4

Why iare twin studies that use a larger sample size better for drawing valid conclusions?

Answer 4

They are more representative of the population.