Question 1

Foxes,cats,and rabbits have enzymes that are heat-sensitive,causing a seasonal variation in coat color due to:

Accepted Answer

A) an environmental effect 
B) multiple alleles 
C) pleiotropy 
D) incomplete dominance 
A) an environmental effect 
B) multiple alleles 
C) pleiotropy 
D) incomplete dominance A

Question 2

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 B

Question 3

A genetic family tree can more correctly be called a ____________.

Accepted Answer

pedigree

Question 4

What is the possible advantage of being heterozygous for the sickle-cell gene?

Accepted Answer

Those who are heterozygous for

Question 5

In snapdragons,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 6

Human height shows a continuous variation from the very short to the very tall.Height is most likely controlled by:

Accepted Answer

A) epistatic genes 
B) sex-linked genes 
C) mutations 
D) multiple genes 
A) epistatic genes 
B) sex-linked genes 
C) mutations 
D) multiple genes

Question 7

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 8

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 9

Put the following terms in the correct order from start to finish.

Accepted Answer

A) gene $\rarr$ chromosome $\rarr$ messenger RNA $\rarr$ primary transcript $\rarr$ protein $\rarr$ polypeptide 
B) chromosome $\rarr$ gene $\rarr$ primary transcript $\rarr$ messenger RNA $\rarr$ protein $\rarr$polypeptide 
C) primary transcript $\rarr$ chromosome $\rarr$ gene $\rarr$ protein  $\rarr$polypeptide $\rarr$ messenger RNA 
D) chromosome $\rarr$ gene $\rarr$ primary transcript $\rarr$ messenger RNA $\rarr$ polypeptide $\rarr$ protein 
E) gene $\rarr$ messenger RNA $\rarr$ primary transcript $\rarr$ chromosome $\rarr$ protein $\rarr$  polypeptide 
A) gene $\rarr$ chromosome $\rarr$ messenger RNA $\rarr$ primary transcript $\rarr$ protein $\rarr$ polypeptide 
B) chromosome $\rarr$ gene $\rarr$ primary transcript $\rarr$ messenger RNA $\rarr$ protein $\rarr$polypeptide 
C) primary transcript $\rarr$ chromosome $\rarr$ gene $\rarr$ protein  $\rarr$polypeptide $\rarr$ messenger RNA 
D) chromosome $\rarr$ gene $\rarr$ primary transcript $\rarr$ messenger RNA $\rarr$ polypeptide $\rarr$ protein 
E) gene $\rarr$ messenger RNA $\rarr$ primary transcript $\rarr$ chromosome $\rarr$ protein $\rarr$  polypeptide

Question 10

What is the product of transcription?

Accepted Answer

A) DNA 
B) Genes 
C) Protein 
D) RNA 
E) All of the choices are correct. 
A) DNA 
B) Genes 
C) Protein 
D) RNA 
E) All of the choices are correct.

Question 11

What is the evolutionary significance of mutation?

Accepted Answer

New genetic combinations can occur,perha

Question 12

Mendel tested for heterozygotes by using:

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 13

Whose work with fruit flies presented the first clear evidence that the genes determining Mendelian traits reside on chromosomes?

Accepted Answer

A) Karl Correns 
B) Gregor Mendel 
C) Thomas Hunt Morgan 
D) Walter Sutton 
A) Karl Correns 
B) Gregor Mendel 
C) Thomas Hunt Morgan 
D) Walter Sutton

Question 14

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

Accepted Answer

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

Question 15

Where does transcription take place in the cell?

Accepted Answer

A) The nucleus 
B) The endoplasmic reticulum 
C) The Golgi complex 
D) The cytoplasm 
E) On the ribosomes 
A) The nucleus 
B) The endoplasmic reticulum 
C) The Golgi complex 
D) The cytoplasm 
E) On the ribosomes

Question 16

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 17

Down syndrome in humans is due to:

Accepted Answer

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

Question 18

Which of the following is a sex-linked disorder?

Accepted Answer

A) Cystic fibrosis 
B) Hemophilia 
C) Huntington's disease 
D) Tay-Sachs disease 
E) Hypercholesterolemia 
A) Cystic fibrosis 
B) Hemophilia 
C) Huntington's disease 
D) Tay-Sachs disease 
E) Hypercholesterolemia

Question 19

The ability to taste PTC is a dominant trait.If a heterozygote woman has a child with a man who is not a taster,what is the chance their child will be a taster?

Accepted Answer

A) 100% 
B) 75% 
C) 50% 
D) 25% 
E) 0% 
A) 100% 
B) 75% 
C) 50% 
D) 25% 
E) 0%

Question 20

If several traits are affected by the same allele,the allele is said to be:

Accepted Answer

A) recessive 
B) dominant 
C) epistatic 
D) pleiotropic 
A) recessive 
B) dominant 
C) epistatic 
D) pleiotropic

Exam 10: Foundations of Genetics

Foxes,cats,and rabbits have enzymes that are heat-sensitive,causing a seasonal variation in coat color due to:

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

A genetic family tree can more correctly be called a ____________.

What is the possible advantage of being heterozygous for the sickle-cell gene?

In snapdragons,pink-flowered plants are produced when red-flowered plants are crossed with white-flowered plants.This type of inheritance can best be described as:

Human height shows a continuous variation from the very short to the very tall.Height is most likely controlled by:

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?

Which of the following crosses represents a dihybrid cross?

Put the following terms in the correct order from start to finish.

What is the product of transcription?

What is the evolutionary significance of mutation?

Mendel tested for heterozygotes by using:

Whose work with fruit flies presented the first clear evidence that the genes determining Mendelian traits reside on chromosomes?

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

Where does transcription take place in the cell?

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

Down syndrome in humans is due to:

Which of the following is a sex-linked disorder?

The ability to taste PTC is a dominant trait.If a heterozygote woman has a child with a man who is not a taster,what is the chance their child will be a taster?

If several traits are affected by the same allele,the allele is said to be:

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

Genomics and Biotechnology

Evolution and Natural Selection

How We Name Living Things

Prokaryotes: the First Single-Celled Creatures

Protists: Advent of the Eukaryotes

Fungi Invade the Land

Evolution of the Animal Phyla

History of the Vertebrates

How Humans Evolved

The Animal Body and How It Moves

Circulation

Respiration

The Path of Food Through the Animal Body

Maintaining the Internal Environment

How the Animal Body Defends Itself

The Nervous System

The Senses

Chemical Signaling Within the Animal Body

Reproduction and Development

Evolution of Plants

Plant Form and Function

Plant Reproduction and Growth

Populations and Communities

Ecosystems

Behavior and the Environment

Human Influences on the Living World

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