Question 1

Multifactorial inheritance includes what factors in addition to multiple genes interacting?

Accepted Answer

A)  diet 
B)  environment 
C)  general health 
D)  amount of exercise 
E)  All of the above.

Question 2

A black dog is bred with a brown dog,and all the puppies have patches of black and brown.The coat color alleles for black and brown are an example of

Accepted Answer

A)  codominance. 
B)  incomplete dominance. 
C)  multiple-allele inheritance. 
D)  multifactorial inheritance. 
E)  polygenic inheritance.

Question 3

Which of the following is/are used to examine inheritance over generations?

Accepted Answer

A)  karyotypes 
B)  a pedigree chart 
C)  genotypes 
D)  a family tree 
E)  phenotypes

Question 4

Duchenne muscular dystrophy (DMD)is a recessive mutation on the X chromosome.Who is more likely to inherit DMD,a daughter with two X chromosomes or a daughter with Turner syndrome?

Accepted Answer

The answer of Duchenne muscular dystrophy (DMD)is a recessive mutation...

Question 5

A karyotype is

Accepted Answer

A)  a diagram depicting the inheritance pattern of a disease allele within a family. 
B)  a chart showing your detailed genetic makeup. 
C)  DNA stripped of all its proteins. 
D)  a diagram of all chromosomes in a cell. 
E)  your blood group.

Question 6

You are home sick with the flu and,while flipping channels,you are riveted by a talk show.The show is searching for the real father of a woman's child.None of the men admit paternity,but she insists that one of them must be the father.As the host reveals the results of the paternity test,he mentions that the results were based on STR analysis from the Y chromosome.He displays the following chart.Who does he reveal is the father?

Accepted Answer

The answer of You are home sick with the flu...

Question 7

Why are X-linked traits more commonly expressed in males?

Accepted Answer

A)  There is no masking of an affected X allele with a normal X in males. 
B)  Females must have two copies of the affected allele to display a phenotype. 
C)  Females may be unknowing carriers and pass on the trait to male progeny. 
D)  Males only have one X chromosome. 
E)  All of the above.

Question 8

Why can you say that males determine the sex of their children?

Accepted Answer

A)  Since males have two X chromosomes, whichever one is passed along to their offspring will determine the sex. 
B)  Males will either contribute an X or a Y chromosome, whereas females will always contribute an X chromosome. 
C)  Male chromosomes are inherited preferentially over female chromosomes. 
D)  Y chromosomes are dominant; X chromosomes are recessive. 
E)  All of the above.

Question 9

Aneuploidy is the result of

Accepted Answer

A)  mutation. 
B)  chromosomal damage. 
C)  chromosomal deletions. 
D)  nondisjunction. 
E)  radiation therapy.

Question 10

Why do investigators use the Y chromosome for genetic analysis?

Accepted Answer

A)  The Y chromosome is technically easier to extract from cells than the X chromosome. 
B)  The Y chromosome rarely undergoes genetic recombination because there is no homologous partner. 
C)  The X chromosome passes through generations largely unchanged and is therefore useless for tracking mutations 
D)  The Y chromosome mutates easily allowing ancestry to be traced over many generations. 
E)  When the X chromosome recombines with the Y chromosome the Y chromosome more accurately reflects inheritance from both parents

Question 11

You cross a red flower with a white flower,and all the seeds result in pink flowers.This is an example of

Accepted Answer

A)  codominance. 
B)  incomplete dominance. 
C)  multiple allele inheritance. 
D)  multifactorial inheritance. 
E)  polygenic inheritance.

Question 12

Is it possible for a female to be color blind? Why or why not?

Accepted Answer

The answer of Is it possible for a female to...

Question 13

Chromosomes are numbered based on their size,such that chromosome 1 is the largest and chromosome 22 is the smallest.Do you think a child with a nondisjunction of chromosome 1 is more or less likely to survive than a child with a nondisjunction of chromosome 22? Explain your answer.

Accepted Answer

The answer of Chromosomes are numbered based on their size,such...

Question 14

You have a gene with alleles X,Y,and Z,and you know that these are codominant alleles.You cross an individual that is homozygous X with an individual that is homozygous Z.What phenotypes will the offspring of this cross express?

Accepted Answer

A)  phenotypes of X and Z, equally 
B)  a phenotype between Z and X 
C)  phenotype Y 
D)  phenotype X 
E)  phenotype Z

Question 15

In addition to a genetic component,some human disorders like depression have been linked to

Accepted Answer

A)  diet. 
B)  sleep patterns. 
C)  drug abuse. 
D)  stressful events. 
E)  disease.

Question 16

If a nondisjunction was going to occur and you could choose for it to happen in either meiosis I or meiosis II,which would you choose and why? Which one is likely to have a better outcome?

Accepted Answer

The answer of If a nondisjunction was going to occur...

Question 17

Which is NOT an example of a polygenic trait?

Accepted Answer

A)  Rh factor 
B)  eye color 
C)  skin color 
D)  height 
E)  These are ALL polygenic traits.

Question 18

Define the term autosome.

Accepted Answer

The answer of Define the term autosome.
...

Question 19

Using a Punnett square,calculate the probability of a son inheriting an X-linked trait if his mother is a carrier and his father is unaffected.(Use X for a normal chromosome,and X' to represent a recessive X-linked trait.)

Accepted Answer

The answer of Using a Punnett square,calculate the probability of...

Question 20

Explain how programs like Women with Infants and Children (WIC)that focus on prenatal and early-childhood nutrition can have an impact on phenotype.

Accepted Answer

The answer of Explain how programs like Women with Infants...

Exam 12: Complex Inheritance Qa: Genetics