Question 1

Approximately once in every _____ births, a newborn survives with 45, 47, or even 48 or 49 chromosomes instead of the usual 46.

Accepted Answer

A)   50
B)   200
C)   500
D)   1,000

Question 2

Birth defects and later illness _____ with in vitro fertilization (IVF) .

Accepted Answer

A)   increase slightly
B)   increase greatly
C)   decrease slightly
D)   decrease greatly

Question 3

The heritability for human traits, such as nearsightedness, _____.

Accepted Answer

A)   is the same in every culture
B)   can differ between cultures
C)   is not influenced by cultural factors
D)   will always be different between cultures

Question 4

When the effects of genes add up to make the phenotype, they are called _____ genes.

Accepted Answer

A)   dominant
B)   recessive
C)   additive
D)   nonadditive

Question 5

Most of the known single-gene disorders are _____.

Accepted Answer

A)   recessive
B)   dominant
C)   difficult to identify
D)   additive

Question 6

The cognitive deficits caused by the genetic condition of _____ are the most common form of inherited mental retardation.

Accepted Answer

A)   Down syndrome
B)   nearsightedness
C)   fragile X syndrome
D)   Huntington disease

Question 7

Which female is more likely to naturally conceive dizygotic twins?

Accepted Answer

A)   a woman from Japan
B)   a woman from Korea
C)   a woman from China
D)   a woman from America

Question 8

A fatal central nervous system disorder caused by a copy number variation-more than 35 repetitions of a particular set of three base pairs-is _____.

Accepted Answer

A)   Down syndrome
B)   nearsightedness
C)   fragile X syndrome
D)   Huntington disease

Question 9

Which mother is at greatest risk of having a child with a chromosomal abnormality?

Accepted Answer

A)   a 20-year-old mother
B)   a 30-year-old mother
C)   a 35-year-old mother
D)   a 40-year-old mother

Question 10

All living things are composed of cells. The work of cells is done by _____.

Accepted Answer

A)   proteins
B)   zygotes
C)   genotypes
D)   deoxyribonucleic acid (DN
A)

Question 11

Sally is born with 47 chromosomes instead of the usual 46. Sally's chances of survival are _____.

Accepted Answer

A)   1 in 50
B)   1 in 200
C)   1 in 500
D)   1 in 1,000

Question 12

In in vitro fertilization (IVF) , to improve the odds of fertilization, a sperm often is inserted directly into each ovum. This procedure is called _____.

Accepted Answer

A)   in vitro fertilization (IVF) 
B)   assisted reproductive technology (ART) 
C)   intra-cytoplasmic injection (ICSI) 
D)   multifactorial

Question 13

In the United States about _____ of in vitro fertilization (IVF)  babies are twins or triplets.

Accepted Answer

A)   25 percent
B)   33 percent
C)   50 percent
D)   75 percent

Question 14

Consultation and testing by trained experts that enable individuals to learn about their genetic heritage, including harmful conditions they might pass along to any children they may conceive, is referred to as _____.

Accepted Answer

A)   couples counseling
B)   marriage counseling
C)   genetic counseling
D)   individual counseling

Question 15

Almost every trait is _____, which means it is affected by many genes.

Accepted Answer

A)   polygenic
B)   nonadditive
C)   X-linked
D)   monozygotic

Question 16

Michael is color-blind. His gene for color blindness is most likely a _____.

Accepted Answer

A)   dominant gene on his X chromosome
B)   dominant gene on his Y chromosome
C)   recessive gene on his X chromosome
D)   recessive gene on his Y chromosome

Question 17

A variation that makes a gene different in some way from other genes for the same characteristics is a(n)  _____.

Accepted Answer

A)   chromosome
B)   zygote
C)   genotype
D)   allele

Question 18

Most recessive genetic disorders are _____.

Accepted Answer

A)   autosome
B)   X-linked
C)   additive
D)   polygenic

Exam 3: Seciton 3: Beginnings: Heredity and Environment

Most recessive genetic disorders are _____.

Correct Answer
verified

Most of the known single-gene disorders are _____.

Correct Answer
verified

A fatal central nervous system disorder caused by a copy number variation-more than 35 repetitions of a particular set of three base pairs-is _____.

Correct Answer
verified

Which female is more likely to naturally conceive dizygotic twins?

Correct Answer
verified

Michael is color-blind. His gene for color blindness is most likely a _____.

Correct Answer
verified

A variation that makes a gene different in some way from other genes for the same characteristics is a(n) _____.

Correct Answer
verified

The heritability for human traits, such as nearsightedness, _____.

Correct Answer
verified

Which mother is at greatest risk of having a child with a chromosomal abnormality?

Correct Answer
verified

Consultation and testing by trained experts that enable individuals to learn about their genetic heritage, including harmful conditions they might pass along to any children they may conceive, is referred to as _____.

Correct Answer
verified

The cognitive deficits caused by the genetic condition of _____ are the most common form of inherited mental retardation.

Correct Answer
verified

Approximately once in every _____ births, a newborn survives with 45, 47, or even 48 or 49 chromosomes instead of the usual 46.

Correct Answer
verified

Almost every trait is _____, which means it is affected by many genes.

Correct Answer
verified

In in vitro fertilization (IVF) , to improve the odds of fertilization, a sperm often is inserted directly into each ovum. This procedure is called _____.

Correct Answer
verified

In the United States about _____ of in vitro fertilization (IVF) babies are twins or triplets.

Correct Answer
verified

Birth defects and later illness _____ with in vitro fertilization (IVF) .

Correct Answer
verified

Sally is born with 47 chromosomes instead of the usual 46. Sally's chances of survival are _____.

Correct Answer
verified

When the effects of genes add up to make the phenotype, they are called _____ genes.

Correct Answer
verified

All living things are composed of cells. The work of cells is done by _____.

Correct Answer
verified

Exam 3: Seciton 3: Beginnings: Heredity and Environment

Most recessive genetic disorders are _____.

Correct AnswerverifiedShow Answer

Most of the known single-gene disorders are _____.

Correct AnswerverifiedShow Answer

A fatal central nervous system disorder caused by a copy number variation-more than 35 repetitions of a particular set of three base pairs-is _____.

Correct AnswerverifiedShow Answer

Which female is more likely to naturally conceive dizygotic twins?

Correct AnswerverifiedShow Answer

Michael is color-blind. His gene for color blindness is most likely a _____.

Correct AnswerverifiedShow Answer

A variation that makes a gene different in some way from other genes for the same characteristics is a(n) _____.

Correct AnswerverifiedShow Answer

The heritability for human traits, such as nearsightedness, _____.

Correct AnswerverifiedShow Answer

Which mother is at greatest risk of having a child with a chromosomal abnormality?

Correct AnswerverifiedShow Answer

Consultation and testing by trained experts that enable individuals to learn about their genetic heritage, including harmful conditions they might pass along to any children they may conceive, is referred to as _____.

Correct AnswerverifiedShow Answer

The cognitive deficits caused by the genetic condition of _____ are the most common form of inherited mental retardation.

Correct AnswerverifiedShow Answer

Approximately once in every _____ births, a newborn survives with 45, 47, or even 48 or 49 chromosomes instead of the usual 46.

Correct AnswerverifiedShow Answer

Almost every trait is _____, which means it is affected by many genes.

Correct AnswerverifiedShow Answer

In in vitro fertilization (IVF) , to improve the odds of fertilization, a sperm often is inserted directly into each ovum. This procedure is called _____.

Correct AnswerverifiedShow Answer

In the United States about _____ of in vitro fertilization (IVF) babies are twins or triplets.

Correct AnswerverifiedShow Answer

Birth defects and later illness _____ with in vitro fertilization (IVF) .

Correct AnswerverifiedShow Answer

Sally is born with 47 chromosomes instead of the usual 46. Sally's chances of survival are _____.

Correct AnswerverifiedShow Answer

When the effects of genes add up to make the phenotype, they are called _____ genes.

Correct AnswerverifiedShow Answer

All living things are composed of cells. The work of cells is done by _____.

Correct AnswerverifiedShow Answer

Correct Answer
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