Question 1

Which of the following chromosomal conditions is treated with testosterone injections?

Accepted Answer

A)  XXX 
B)  trisomy 21 
C)  XO 
D)  XXY 
E)  XYY

Question 2

Match the following letters to the number with which they best correspond.
 a.genotype
b.heterozygous
c.dihybrid cross
d.pleiotropic
e.codominance
f.epistasis
g.incomplete dominance
h.syndrome
i.continuous variation
j.aneuploidy
-refers to two alleles that are both fully expressed in heterozygous individuals

Accepted Answer

The answer of Match the following letters to the number...

Question 3

Achondroplasia
Achondroplasia is an autosomal dominant disorder,however homozygous dominant individuals do not have achondroplasia - they either die before birth or very shortly thereafter.The homozygous recessive condition is normal.A dwarf couple decide to have children.Use this information to answer the following question(s).
-In the example above,what is the probability that this couple will have a normal child?

Accepted Answer

A)  0 
B)  1/4 
C)  1/3 
D)  2/3 
E)  1/2

Question 4

Which of the following is true about Gregor Mendel when he first started his experiments?

Accepted Answer

A)  Mendel worked with garden pea plants. 
B)  Mendel knew that some plants "breed true." 
C)  He knew that genes were responsible for observable traits. 
D)  Mendel worked on garden pea plants and knew that some plants "breed true." 
E)  Mendel worked on garden pea plants. He knew that some plants "breed true" and that genes were responsible for observable traits.

Question 5

The most common type of mutation that cause cystic fibrosis is a

Accepted Answer

A)  deletion. 
B)  insertion. 
C)  base-pair substitution. 
D)  gene duplication. 
E)  transformation.

Question 6

Purple flower (A)is dominant over white flower (a),and tall stem (B)is dominant over short stem (b).The Punnett square represents a cross between two dihybrids (AaBb × AaBb).
Examine the figure above,and answer the following question(s).
-In the figure above,what would be the genotype of plant #7?

Accepted Answer

A)  AaBb 
B)  AABb 
C)  AaBB 
D)  AABB 
E)  aaBB

Question 7

Match the following letters to the number with which they best correspond.
 a.genotype
b.heterozygous
c.dihybrid cross
d.pleiotropic
e.codominance
f.epistasis
g.incomplete dominance
h.syndrome
i.continuous variation
j.aneuploidy
-a range of small differences in a shared trait

Accepted Answer

The answer of Match the following letters to the number...

Question 8

Which of the following organs have epithelial lined passageways and ducts that are affected in cystic fibrosis:

Accepted Answer

A)  lungs 
B)  liver 
C)  pancreas 
D)  intestines 
E)  all of these organs are affected

Question 9

Which of the following is TRUE of the immediate impact of Mendel's publication in 1866 of the basic laws of inheritance?

Accepted Answer

A)  it gave Darwin the insight he needed into the mechanism of variation 
B)  it started a genetic revolution 
C)  it made Mendel one of the most famous scientists of his day 
D)  it did more than of these things (a - c) 
E)  it had no immediate impact

Question 10

Classification.Answer the questions in reference to the five disorders listed below.
a.Turner syndrome
b.PKU
c.Hutchinson-Gifford progeria
d.hemophilia
e.Tay-Sachs
-disorder that results from lipid accumulations around nerve cells

Accepted Answer

The answer of Classification.Answer the questions in reference to the...

Question 11

Which of the following is TRUE about cystic fibrosis?

Accepted Answer

A)  there is no cure 
B)  1 in 25 people carry the cystic fibrosis mutation 
C)  1 in 3,300 people have the disease 
D)  cystic fibrosis patients do not live longer than 30 years 
E)  all of these are true

Question 12

The process by which chromosomes fail to separate during meiosis is called

Accepted Answer

A)  aneuploidy. 
B)  trisomy. 
C)  monosomy. 
D)  nondisjunction. 
E)  polyploidy.

Question 13

A gene that produces multiple effects is called

Accepted Answer

A)  co-dominant gene. 
B)  an X-linked gene. 
C)  an epistatic gene. 
D)  a pleiotropic gene. 
E)  an incompletely dominant gene.

Question 14

Purple flower (A)is dominant over white flower (a),and tall stem (B)is dominant over short stem (b).The Punnett square represents a cross between two dihybrids (AaBb × AaBb).
Examine the figure above,and answer the following question(s).
-In the figure above,what is the ratio of phenotypes in this case?

Accepted Answer

A)  1: 1:1:1 
B)  3:1 
C)  6:3:3:1 
D)  9:3:3:1 
E)  15:1

Question 15

In the second generation of a cross of DDRR with ddrr the most common genotype would be

Accepted Answer

A)  DDRR. 
B)  DdRR. 
C)  DdRr. 
D)  ddRR. 
E)  ddRr.

Exam 9: Patterns of Inheritance