Question 1

To what disease do individuals heterozygous for cystic fibrosis have increased resistance?

Accepted Answer

A)  hemophilia 
B)  Tay-Sachs 
C)  typhoid 
D)  diptheria 
E)  cholera 
A)  hemophilia 
B)  Tay-Sachs 
C)  typhoid 
D)  diptheria 
E)  cholera

Question 2

Which of the following was unknown to Mendel?

Accepted Answer

A)  complementary base pairing 
B)  chromosomes 
C)  meiosis 
D)  the structure of DNA 
E)  none of these were known to Mendel 
A)  complementary base pairing 
B)  chromosomes 
C)  meiosis 
D)  the structure of DNA 
E)  none of these were known to Mendel

Question 3

For this problem,you may want to create a Punnett Square on a separate piece of paper.Assume brown eyes are dominant to blue eyes and dimples are dominant to no dimples.John has brown eyes and his mother has blue eyes.John does not have dimples.Zena has blue eyes and also has no dimples.What are the chances if this couple have children,they will produce a child with blue eyes and no dimples?

Accepted Answer

A)  0 
B)  1/4 
C)  1/2 
D)  3/4 
E)  there is not enough information provided to solve this problem 
A)  0 
B)  1/4 
C)  1/2 
D)  3/4 
E)  there is not enough information provided to solve this problem

Question 4

In a person who does NOT have cystic fibrosis,what is the related normal condition?

Accepted Answer

A)  mucus slides easily over epithelial surfaces and can more easily be expelled 
B)  osmotic balance in tissues is maintained by pumping sodium out of cells and chloride into cells 
C)  pH balances are maintained by pH buffers, mainly the bicarbonate ion 
D)  muscle fibers contract in coordination allowing smooth whole muscle contractions 
E)  plasma membranes function properly to allow nonpolar molecules to diffuse into and out of the cells 
A)  mucus slides easily over epithelial surfaces and can more easily be expelled 
B)  osmotic balance in tissues is maintained by pumping sodium out of cells and chloride into cells 
C)  pH balances are maintained by pH buffers, mainly the bicarbonate ion 
D)  muscle fibers contract in coordination allowing smooth whole muscle contractions 
E)  plasma membranes function properly to allow nonpolar molecules to diffuse into and out of the cells

Question 5

If a child belongs to blood type O,he or she could NOT have been produced by which set of parents?

Accepted Answer

A)  type A mother and type B father 
B)  type A mother and type O father 
C)  type AB mother and type O father 
D)  type O mother and type O father 
E)  type AB mother and type B father 
A)  type A mother and type B father 
B)  type A mother and type O father 
C)  type AB mother and type O father 
D)  type O mother and type O father 
E)  type AB mother and type B father

Question 6

Which of the first three statements about independent assortment is NOT true?

Accepted Answer

A)  genes on homologous chromosomes assort independently 
B)  genes on the same chromosome that are far apart tend to assort independently 
C)  genes close together on the same chromosome tend to assort independently 
D)  all of the first three statements about independent assortment are NOT true 
E)  one of the first three statements about independent assortment is NOT true 
A)  genes on homologous chromosomes assort independently 
B)  genes on the same chromosome that are far apart tend to assort independently 
C)  genes close together on the same chromosome tend to assort independently 
D)  all of the first three statements about independent assortment are NOT true 
E)  one of the first three statements about independent assortment is NOT true

Question 7

If all offspring of a cross have the same heterozygous genotype,the parents of the cross would most likely be

Accepted Answer

A)  homozygous dominant and homozygous recessive. 
B)  both heterozygous. 
C)  heterozygous and homozygous recessive. 
D)  homozygous dominant and heterozygous. 
E)  both homozygous dominant. 
A)  homozygous dominant and homozygous recessive. 
B)  both heterozygous. 
C)  heterozygous and homozygous recessive. 
D)  homozygous dominant and heterozygous. 
E)  both homozygous dominant.

Question 8

Which of the following organs are likely to be affected by a defective CFTR protein?

Accepted Answer

A)  lungs 
B)  intestines 
C)  heart 
D)  lungs and intestines 
E)  heart and intestines 
A)  lungs 
B)  intestines 
C)  heart 
D)  lungs and intestines 
E)  heart and intestines

Question 9

A boy inherits his X chromosome from

Accepted Answer

A)  his father. 
B)  his mother. 
C)  either his father or his mother. 
D)  both his father and his mother. 
A)  his father. 
B)  his mother. 
C)  either his father or his mother. 
D)  both his father and his mother.

Question 10

Gene A occurs on chromosome #5; gene B occurs on chromosome #21.Therefore,these two portions of the chromosome CANNOT be

Accepted Answer

A)  homologous. 
B)  in the same individual. 
C)  homozygous. 
D)  alleles. 
E)  recessive. 
A)  homologous. 
B)  in the same individual. 
C)  homozygous. 
D)  alleles. 
E)  recessive.

Question 11

The discarded theory of blending inheritance appears most like

Accepted Answer

A)  X-linked inheritance. 
B)  dihybridization. 
C)  codominance. 
D)  incomplete dominance. 
E)  complete dominance. 
A)  X-linked inheritance. 
B)  dihybridization. 
C)  codominance. 
D)  incomplete dominance. 
E)  complete dominance.

Question 12

In a pedigree chart,a female showing the specific trait being studied is indicated by a

Accepted Answer

A)  clear square. 
B)  darkened square. 
C)  clear circle. 
D)  darkened diamond. 
E)  darkened circle. 
A)  clear square. 
B)  darkened square. 
C)  clear circle. 
D)  darkened diamond. 
E)  darkened circle.

Question 13

What does the normal protein that is encoded by the "cystic fibrosis" gene do?

Accepted Answer

A)  transports chloride ions across membranes 
B)  delivers chloride ions to the endoplasmic reticulum 
C)  binds chloride ions to DNA prior to gene expression 
D)  binds chloride ions to bacteria so they are more easily recognized by white blood cells 
E)  the normal protein does more than one of these things 
A)  transports chloride ions across membranes 
B)  delivers chloride ions to the endoplasmic reticulum 
C)  binds chloride ions to DNA prior to gene expression 
D)  binds chloride ions to bacteria so they are more easily recognized by white blood cells 
E)  the normal protein does more than one of these things

Question 14

Four of the five answers listed below are related conditions in which abnormal numbers of chromosomes are present.Select the EXCEPTION.

Accepted Answer

A)  monosomy 
B)  aneuploidy 
C)  polyploidy 
D)  diploidy 
E)  trisomy 
A)  monosomy 
B)  aneuploidy 
C)  polyploidy 
D)  diploidy 
E)  trisomy

Question 15

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 a gene whose product influences multiple genes

Accepted Answer

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

Question 16

Which of the following prenatal tests can be performed earliest in a pregnancy?

Accepted Answer

A)  amniocentesis 
B)  obstetric sonography 
C)  fetoscopy 
D)  chorionic villus sampling 
E)  preimplantation genetic diagnosis 
A)  amniocentesis 
B)  obstetric sonography 
C)  fetoscopy 
D)  chorionic villus sampling 
E)  preimplantation genetic diagnosis

Question 17

When is preimplantation diagnosis performed?

Accepted Answer

A)  before in vitro fertilization takes place 
B)  when the embryo has at least 100 cells 
C)  when the embryo is at the 8 cell stage 
D)  when the embryo becomes a fetus at 8 weeks 
E)  shortly after birth 
A)  before in vitro fertilization takes place 
B)  when the embryo has at least 100 cells 
C)  when the embryo is at the 8 cell stage 
D)  when the embryo becomes a fetus at 8 weeks 
E)  shortly after birth

Question 18

Which of the following was the dominant theory of inheritance before Mendel?

Accepted Answer

A)  blending of traits 
B)  acquired characteristics 
C)  natural selection 
D)  spontaneous appearance 
E)  paternal dominance 
A)  blending of traits 
B)  acquired characteristics 
C)  natural selection 
D)  spontaneous appearance 
E)  paternal dominance

Question 19

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 is dominant

Accepted Answer

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

Question 20

Observable traits are known in genetics as

Accepted Answer

A)  phenotypes. 
B)  genotypes. 
C)  homozygous. 
D)  heterozygous. 
E)  more than one of these. 
A)  phenotypes. 
B)  genotypes. 
C)  homozygous. 
D)  heterozygous. 
E)  more than one of these.

Exam 9: Patterns of Inheritance

To what disease do individuals heterozygous for cystic fibrosis have increased resistance?

Which of the following was unknown to Mendel?

In a person who does NOT have cystic fibrosis,what is the related normal condition?

If a child belongs to blood type O,he or she could NOT have been produced by which set of parents?

Which of the first three statements about independent assortment is NOT true?

If all offspring of a cross have the same heterozygous genotype,the parents of the cross would most likely be

Which of the following organs are likely to be affected by a defective CFTR protein?

A boy inherits his X chromosome from

Gene A occurs on chromosome #5; gene B occurs on chromosome #21.Therefore,these two portions of the chromosome CANNOT be

The discarded theory of blending inheritance appears most like

In a pedigree chart,a female showing the specific trait being studied is indicated by a

What does the normal protein that is encoded by the "cystic fibrosis" gene do?

Four of the five answers listed below are related conditions in which abnormal numbers of chromosomes are present.Select the EXCEPTION.

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 a gene whose product influences multiple genes

Which of the following prenatal tests can be performed earliest in a pregnancy?

When is preimplantation diagnosis performed?

Which of the following was the dominant theory of inheritance before Mendel?

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 is dominant

Observable traits are known in genetics as

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