Question 1

Genes are made of

Accepted Answer

A)  ribosomes. 
B)  cytoplasm. 
C)  protein. 
D)  DNA. 
E)  lipids. 
A)  ribosomes. 
B)  cytoplasm. 
C)  protein. 
D)  DNA. 
E)  lipids.

Question 2

Where are genes located in the cell?

Accepted Answer

A)  on chromosomes 
B)  on the endoplasmic reticulum 
C)  in the Golgi complex 
D)  within the cytoplasm 
E)  on the plasma membrane 
A)  on chromosomes 
B)  on the endoplasmic reticulum 
C)  in the Golgi complex 
D)  within the cytoplasm 
E)  on the plasma membrane

Question 3

A ______________ is a DNA molecule that contains about 1000 genes and has proteins to help it retain its shape.

Accepted Answer

The answer of A ______________ is a DNA molecule that...

Question 4

A woman with blood type B has a baby with blood type O.A man she says is the baby's father has blood type A,but he denies having fathered the child.Could he be the father?

Accepted Answer

The answer of A woman with blood type B has...

Question 5

Gregor Mendel's work was different from that of other researchers working on inheritance in his day because he alone

Accepted Answer

A)  was a religious man. 
B)  worked with pea plants. 
C)  knew how to grow plants. 
D)  actually counted the numbers and types of offspring. 
A)  was a religious man. 
B)  worked with pea plants. 
C)  knew how to grow plants. 
D)  actually counted the numbers and types of offspring.

Question 6

Mendel tested for heterozygotes by using a

Accepted Answer

A)  dihybrid cross. 
B)  testcross. 
C)  monohybrid cross. 
D)  true-breeding cross. 
A)  dihybrid cross. 
B)  testcross. 
C)  monohybrid cross. 
D)  true-breeding cross.

Question 7

Humans who have lost one copy of an autosome are called ____________ and generally do not survive development.

Accepted Answer

A)  monosomics 
B)  trisomics 
C)  eusomics 
D)  diploids 
A)  monosomics 
B)  trisomics 
C)  eusomics 
D)  diploids

Question 8

In the human ABO blood grouping,there are four basic blood types,type A,type B,type AB,and type O.The blood proteins A and B are

Accepted Answer

A)  simple dominant and recessive traits. 
B)  codominant. 
C)  incompletely dominant. 
D)  sex-linked traits. 
A)  simple dominant and recessive traits. 
B)  codominant. 
C)  incompletely dominant. 
D)  sex-linked traits.

Question 9

An individual is said to be _____________ if it has two copies of the same factor for a given trait.

Accepted Answer

The answer of An individual is said to be _____________...

Question 10

In Japanese four o'clock flowers,pink-flowered plants are produced when red-flowered plants are crossed with white-flowered plants.This type of inheritance can best be described as

Accepted Answer

A)  simple dominant and recessive traits. 
B)  codominance. 
C)  incomplete dominance. 
D)  sex-linked traits. 
A)  simple dominant and recessive traits. 
B)  codominance. 
C)  incomplete dominance. 
D)  sex-linked traits.

Question 11

A dominant human genetic disorder that does not reveal itself until middle age is _______________.

Accepted Answer

Huntington

Question 12

The outward expression of an organism's genotype is referred to as its genotype.

Accepted Answer

A) True 
 B)False

Question 13

Tall is dominant to dwarf in pea plants.If two dwarf pea plants were crossed,their offspring will be

Accepted Answer

A)  all tall plants. 
B)  all dwarf plants. 
C)  half tall,half dwarf plants. 
D)  plants of an intermediate height. 
A)  all tall plants. 
B)  all dwarf plants. 
C)  half tall,half dwarf plants. 
D)  plants of an intermediate height.

Question 14

Red-green colorblindness is a sex-linked trait.A woman with normal color vision,whose father was colorblind,mates with a colorblind man.What chance do each of their sons have of being colorblind?

Accepted Answer

A)  50% chance 
B)  100% chance 
C)  0% chance 
D)  10% chance 
A)  50% chance 
B)  100% chance 
C)  0% chance 
D)  10% chance

Question 15

Hemophilia is a group of different inherited blood-clotting disorders.Which is true about hemophilia?

Accepted Answer

A)  It causes sterility 
B)  It is more common in females than in males 
C)  It is more common in males than in females 
D)  It is inherited only on the autosomes 
A)  It causes sterility 
B)  It is more common in females than in males 
C)  It is more common in males than in females 
D)  It is inherited only on the autosomes

Question 16

Which of the following crosses represents a dihybrid cross?

Accepted Answer

A)  RRrr x DdDd 
B)  RR x Dd 
C)  RrDd x RRdd 
D)  RD x Rd 
E)  Rd x RR 
A)  RRrr x DdDd 
B)  RR x Dd 
C)  RrDd x RRdd 
D)  RD x Rd 
E)  Rd x RR

Question 17

Nondisjunction of chromosomes resulting in aneuploidy occurs during

Accepted Answer

A)  anaphase of mitosis. 
B)  prophase I. 
C)  metaphase II. 
D)  anaphase I or II. 
E)  telophase I. 
A)  anaphase of mitosis. 
B)  prophase I. 
C)  metaphase II. 
D)  anaphase I or II. 
E)  telophase I.

Question 18

______________ effects occur when a single allele has more than one effect on the phenotype.

Accepted Answer

The answer of ______________ effects occur when a single allele...

Question 19

Which of the following statements about how genotype determines phenotype is correct?

Accepted Answer

A)  Proteins determine the sequence of genes. 
B)  Amino acids are located on chromosomes and determine what genes will be expressed. 
C)  Associations of proteins form polypeptides,which contain genes. 
D)  Genes encode a sequence of amino acids for a particular polypeptide or protein. 
E)  Genes are located on proteins,which encode a sequence of amino acids. 
A)  Proteins determine the sequence of genes. 
B)  Amino acids are located on chromosomes and determine what genes will be expressed. 
C)  Associations of proteins form polypeptides,which contain genes. 
D)  Genes encode a sequence of amino acids for a particular polypeptide or protein. 
E)  Genes are located on proteins,which encode a sequence of amino acids.

Question 20

Down syndrome in humans is due to

Accepted Answer

A)  monosomy (one copy of chromosome #21). 
B)  two Y chromosomes. 
C)  three copies of chromosome #21. 
D)  three X chromosomes. 
A)  monosomy (one copy of chromosome #21). 
B)  two Y chromosomes. 
C)  three copies of chromosome #21. 
D)  three X chromosomes.

Exam 10: Foundations of Genetics

Genes are made of

Where are genes located in the cell?

A ______________ is a DNA molecule that contains about 1000 genes and has proteins to help it retain its shape.

A woman with blood type B has a baby with blood type O.A man she says is the baby's father has blood type A,but he denies having fathered the child.Could he be the father?

Gregor Mendel's work was different from that of other researchers working on inheritance in his day because he alone

Mendel tested for heterozygotes by using a

Humans who have lost one copy of an autosome are called ____________ and generally do not survive development.

In the human ABO blood grouping,there are four basic blood types,type A,type B,type AB,and type O.The blood proteins A and B are

An individual is said to be _____________ if it has two copies of the same factor for a given trait.

In Japanese four o'clock flowers,pink-flowered plants are produced when red-flowered plants are crossed with white-flowered plants.This type of inheritance can best be described as

A dominant human genetic disorder that does not reveal itself until middle age is _______________.

The outward expression of an organism's genotype is referred to as its genotype.

Tall is dominant to dwarf in pea plants.If two dwarf pea plants were crossed,their offspring will be

Red-green colorblindness is a sex-linked trait.A woman with normal color vision,whose father was colorblind,mates with a colorblind man.What chance do each of their sons have of being colorblind?

Hemophilia is a group of different inherited blood-clotting disorders.Which is true about hemophilia?

Which of the following crosses represents a dihybrid cross?

Nondisjunction of chromosomes resulting in aneuploidy occurs during

______________ effects occur when a single allele has more than one effect on the phenotype.

Which of the following statements about how genotype determines phenotype is correct?

Down syndrome in humans is due to

The Science of Biology

The Chemistry of Life

Molecules of Life

Cells

Energy and Life

Photosynthesis: Acquiring Energy From the Sun

How Cells Harvest Energy From Food

Mitosis

Meiosis

DNA: The Genetic Material

How Genes Work

The New Biology

Evolution and Natural Selection

Exploring Biological Diversity

Evolution of Microbial Life

Evolution of Plants

Evolution of Animals

Populations and Communities

Ecosystems

Behavior and the Environment

How Human Influence the Living World

The Animal Body and How It Moves

Circulation

Respiration

The Path of Food Through the Animal Body

Maintaining the Internal Environment

How the Body Defends Itself

The Nervous System

Chemical Signaling Within the Animal Body

Reproduction and Development

Plant Form and Function

Plant Reproduction and Growth

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