Case Workbook for Human Genetics

Biology

Quiz 8 :

Genetics of Behavior

Quiz 8 :

Genetics of Behavior

Question Type
search
arrow
If your identical twin had these conditions, what is the chance that you would too? a. schizophrenia b. narcolepsy with cataplexy c. Alzheimer disease
Free
Essay
Answer:

Answer:

a. 40%
b. 25-31%
c. 60%

Tags
Choose question tag
close menu
arrow
Attention deficit hyperactivity disorder (ADHD) in children has been attributed to poor parenting skills, food additives, and too much television. A recent study showed a heritability of 0.8. What does this mean?
Free
Essay
Answer:

Answer:

ADHD probably has a high hereditary component.

Tags
Choose question tag
close menu
arrow
In autistic disorder, a child ceases communicating and develops abnormal repetitive behaviors. Siblings have a 3 to 5% risk of also being affected. Twin studies indicate concordance of 69-98%, which is considered to be very high. How can sibling studies suggest a minimal genetic component, yet twin studies suggest the opposite? What experimental approach might reveal more about causes of autistic disorder?
Free
Essay
Answer:

Answer:

Identical twins may act alike if they are treated alike. MZ twins reared apart who develop the condition would indicate a genetic cause.

Tags
Choose question tag
close menu
arrow
Depression is a multifactorial trait. List three types of evidence that would suggest a large hereditary component to the illness.
Essay
Answer:
Tags
Choose question tag
close menu
arrow
The incidence of schizophrenia in the general population is 1%. Offspring of two people with schizophrenia have a risk of 13%. Why isn't this risk 25%, as Mendel's first law predicts?
Essay
Answer:
Tags
Choose question tag
close menu