Question 1

Height does not follow a bell-shaped curve population distribution.

Accepted Answer

A) True 
 B)False

Question 2

MATCHING
Match the appropriate terms with the descriptions. You may choose the same answer for more than one question.
-Often useful to study complex traits in humans

Accepted Answer

A) multifactorial trait 
B) intelligence quotient 
C) concordance 
D) bell curve 
E) monozygotic twins
F)developmental dyslexia
G)spina bifida
H)folic acid

Question 3

If monozygotic twins demonstrate very high concordance for a trait whether they are raised together or apart,what does this suggest about the heritability of this trait? Explain your answer.

Accepted Answer

The answer of If monozygotic twins demonstrate very high concordance...

Question 4

Which of the following statements about multifactorial traits is FALSE?

Accepted Answer

A)  The phenotypic distribution of multifactorial traits is often a bell-shaped curve. 
B)  A multifactorial trait involves interactions of genes with the environment. 
C)  A wide range of phenotypes results from multifactorial traits. 
D)  Environmental factors such as nutrition can affect height, which is a multifactorial trait. 
E)  The inheritance of multifactorial traits exhibits simple dominance and recessiveness.

Question 5

In the case of multifactorial traits,

Accepted Answer

A)  the phenotypic distribution follows no particular pattern. 
B)  traits are inherited in a simple dominant or recessive manner. 
C)  only one gene determines the phenotype. 
D)  environmental factors play a role in determining the phenotype. 
E)  All of these are characteristics of multifactorial traits.

Question 6

In the case of complex traits,

Accepted Answer

A)  all of the genes involved are present on the same chromosome. 
B)  at least three genes are involved. 
C)  the phenotype is determined strictly by environmental factors. 
D)  there can be a wide range of phenotypes. 
E)  the trait is never influenced by environmental factors.

Question 7

In humans,obesity is

Accepted Answer

A)  a multifactorial trait. 
B)  always easily treated with leptin. 
C)  a simple dominant trait. 
D)  entirely controlled by genetics. 
E)  determined by at most two genes.

Question 8

What is the difference between simple traits and complex traits? What are polygenic and multifactorial traits?

Accepted Answer

The answer of What is the difference between simple traits...

Question 9

A particular trait shows a high concordance in MZ twins raised together but a lower concordance in MZ twins raised apart.What do these results indicate about genetic and environmental components controlling this trait?

Accepted Answer

The answer of A particular trait shows a high concordance...

Question 10

There are four basic types of spina bifida.

Accepted Answer