Question 1

Place the following in order from smallest, simplest, least complex, to largest and most inclusive:

Accepted Answer

A)  chromosome, gene, genome, nucleotide 
B)  nucleotide, gene, chromosome, genome 
C)  genome, chromosome, gene, nucleotide 
D)  gene, nucleotide, genome, chromosome 
E)  nucleotide, gene, genome, chromosome 
A)  chromosome, gene, genome, nucleotide 
B)  nucleotide, gene, chromosome, genome 
C)  genome, chromosome, gene, nucleotide 
D)  gene, nucleotide, genome, chromosome 
E)  nucleotide, gene, genome, chromosome

Question 2

The process by which a piece of a chromosome breaks off and then attaches to another chromosome is referred to as ________.

Accepted Answer

The answer of The process by which a piece of...

Question 3

Based on the information below, answer the following two questions, assuming complete dominance.
"In humans, a widow's peak is a dominant trait,
and a straight hairline is a recessive trait."
-If an individual homozygous dominant for widow's peak has a child with an individual heterozygous for widow's peak, what is the chance that the child will have a homozygous dominant genotype?

Accepted Answer

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

Question 4

In ________, the phenotype of the heterozygous genotype is an intermediate between the phenotype of either homozygous genotype.

Accepted Answer

incomplete

Question 5

A recessive allele associated with chromosome 15 causes an enzyme deficiency disease called

Accepted Answer

A)  Tay-Sachs 
B)  PKU 
C)  Patau syndrome 
D)  Turner syndrome 
E)  Edwards syndrome 
A)  Tay-Sachs 
B)  PKU 
C)  Patau syndrome 
D)  Turner syndrome 
E)  Edwards syndrome

Question 6

Which of the following genotypes results in a female phenotype?

Accepted Answer

A)  XY 
B)  XYY 
C)  XO 
D)  XXY 
E)  both X and XXY 
A)  XY 
B)  XYY 
C)  XO 
D)  XXY 
E)  both X and XXY

Question 7

In polygenic inheritance,

Accepted Answer

A)  all individuals in the population are initially heterozygous for a particular trait 
B)  the environment has no influence in phenotype expression 
C)  the genotype makeup of individuals in a population is the only factor influencing phenotypes 
D)  multiple alleles and genes contribute to a phenotype 
E)  all traits are expressed as incomplete dominance 
A)  all individuals in the population are initially heterozygous for a particular trait 
B)  the environment has no influence in phenotype expression 
C)  the genotype makeup of individuals in a population is the only factor influencing phenotypes 
D)  multiple alleles and genes contribute to a phenotype 
E)  all traits are expressed as incomplete dominance

Question 8

Failure of homologous chromosomes or sister chromatids to separate properly is called ________.

Accepted Answer

The answer of Failure of homologous chromosomes or sister chromatids...

Question 9

Explain why in some cases, linked genes may be separated during crossing-over, yet at other times, linked genes are not affected by the recombination during meiosis.

Accepted Answer

Linked genes are different genes located

Question 10

Genes represent the set of instructions for the expression of one or more traits human beings and influence human behaviors by

Accepted Answer

A)  directly causing specific changes in mood or patterns of behavior 
B)  producing protein products that serve as switches for directly turning on or off certain behaviors 
C)  directing the synthesis of protein products that influence but do not directly cause most human behaviors 
D)  activating behavior pathways, like those leading to depression or happiness 
E)  functioning as specific behavior suppressors 
A)  directly causing specific changes in mood or patterns of behavior 
B)  producing protein products that serve as switches for directly turning on or off certain behaviors 
C)  directing the synthesis of protein products that influence but do not directly cause most human behaviors 
D)  activating behavior pathways, like those leading to depression or happiness 
E)  functioning as specific behavior suppressors

Question 11

A deletion occurs when a piece of chromosome breaks off and is lost.

Accepted Answer

A) True 
 B)False

Question 12

A display of an individual's chromosomes is known as a(n) ________.

Accepted Answer

The answer of A display of an individual's chromosomes is...

Question 13

Cystic fibrosis is the most common fatal genetic disease in North America and results in what type of allele located on chromosome 7?

Accepted Answer

A)  recessive 
B)  dominant 
C)  homozygous 
D)  heterozygous 
E)  polygenic 
A)  recessive 
B)  dominant 
C)  homozygous 
D)  heterozygous 
E)  polygenic

Question 14

Match between columns
                        Premises: recessive allele on chromosome 15
trisomy 18
one X chromosome; no Y or additional X chromosome
XXY
trisomy 21

Accepted Answer

The Answer of Down syndrome and Turner syndrome and Tay-Sachs is...

Question 15

Linked genes are not influenced by crossing-over during meiosis.

Accepted Answer

A) True 
 B)False

Question 16

During embryological development, if a certain gene on the ________ chromosome is activated during the sixth or seventh week of development, the embryo will develop into a male.

Accepted Answer

The answer of During embryological development, if a certain gene...

Question 17

If the two alleles of a particular gene pair are the same, the individual is ________ for that gene.

Accepted Answer

The answer of If the two alleles of a particular...

Question 18

Polygenic traits display phenotypes that

Accepted Answer

A)  are most commonly reflective of the heterozygous condition 
B)  usually express the dominate condition in greater than 75% of the population 
C)  represent a continuous range within the population 
D)  often are lethal to second generation of children 
E)  are masked by a codominance condition 
A)  are most commonly reflective of the heterozygous condition 
B)  usually express the dominate condition in greater than 75% of the population 
C)  represent a continuous range within the population 
D)  often are lethal to second generation of children 
E)  are masked by a codominance condition

Question 19

For several phenotypes in the human population, it is clear that more than just the genotype is influencing the expression of the trait. Analysis of human populations indicates that height and weight are examples of phenotypes under environmental influence as well as genotype. Provide evidence that would support the contention that both environment and genotype influence human weight.

Accepted Answer

Several investigators have collected dat

Question 20

Variations of homologous genes that result in differences in structure and function are

Accepted Answer

A)  alleles 
B)  loci 
C)  autosomes 
D)  dominant 
E)  linked 
A)  alleles 
B)  loci 
C)  autosomes 
D)  dominant 
E)  linked

Exam 19: Genetics and Inheritance

Place the following in order from smallest, simplest, least complex, to largest and most inclusive:

The process by which a piece of a chromosome breaks off and then attaches to another chromosome is referred to as ________.

In ________, the phenotype of the heterozygous genotype is an intermediate between the phenotype of either homozygous genotype.

A recessive allele associated with chromosome 15 causes an enzyme deficiency disease called

Which of the following genotypes results in a female phenotype?

In polygenic inheritance,

Failure of homologous chromosomes or sister chromatids to separate properly is called ________.

Explain why in some cases, linked genes may be separated during crossing-over, yet at other times, linked genes are not affected by the recombination during meiosis.

Genes represent the set of instructions for the expression of one or more traits human beings and influence human behaviors by

A deletion occurs when a piece of chromosome breaks off and is lost.

A display of an individual's chromosomes is known as a(n) ________.

Cystic fibrosis is the most common fatal genetic disease in North America and results in what type of allele located on chromosome 7?

Linked genes are not influenced by crossing-over during meiosis.

During embryological development, if a certain gene on the ________ chromosome is activated during the sixth or seventh week of development, the embryo will develop into a male.

If the two alleles of a particular gene pair are the same, the individual is ________ for that gene.

Polygenic traits display phenotypes that

Variations of homologous genes that result in differences in structure and function are

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