Question 1

Is a change in nucleotide sequence always detrimental?

Accepted Answer

A)   Yes,it always leads to a loss of protein function.
B)   It can also be beneficial.
C)   It can also have no effect at all.
D)   Both B and C

Question 2

Two people with Huntington disease,an autosomal dominant disorder,have a son.What are the chances he will get the disease? (Draw a Punnett square to help you determine the answer. )

Accepted Answer

A)   1:4 chance
B)   2:4 chance
C)   3:4 chance
D)   4:4 chance
E)   less than 1:4

Question 3

The process responsible for making chromosomes that have pieces taken from two different chromosomes is called

Accepted Answer

A)   random alignment.
B)   independent assortment.
C)   recombination.
D)   DNA duplication.
E)   random realignment.

Question 4

The appearance of an organism is known as its

Accepted Answer

A)   karyotype.
B)   genotype.
C)   phenotype.
D)   holotype.
E)   physiotype.

Question 5

In order for a child to develop cystic fibrosis _____.

Accepted Answer

A)   a sperm carrying a CF allele must fertilize an egg that also has that allele
B)   genetic recombination must occur in the father but not the mother
C)   genetic recombination must occur in the mother but not the father
D)   more than one sperm in the father must carry the CF allele
E)   more than one egg in the mother must carry the CF allele

Question 6

What is the difference between meiosis I and II?

Accepted Answer

A)   During meiosis I,sister chromatids separate.
B)   Meiosis II produces haploid daughter cells.
C)   Meiosis I begins with a haploid cell containing 23 pairs of chromosomes.
D)   Meiosis II produces daughter cells that will each develop into egg or sperm.
E)   B and D

Question 7

What is the process where maternal and paternal chromosomes exchange genetic material?

Accepted Answer

A)   gamete fusion
B)   recombination
C)   independent assortment
D)   meiosis
E)   mitosis

Question 8

How are gametes different from the rest of the body's cells?

Accepted Answer

A)   Gametes are diploid,whereas other cells are haploid.
B)   Gametes are sex cells.
C)   Gametes are haploid,containing only one copy of each chromosome.
D)   Gametes are generated from a specialized form of cell division called meiosis.
E)   B,C,and D

Question 9

Both parents have one copy of a dominant allele for Gene 87 and one recessive allele for Gene 87.What is the chance that their children will inherit the recessive condition (two copies of Gene 87) ? You may need to draw a Punnett square to figure this out.

Accepted Answer

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

Question 10

Children often have many of the phenotypes of their parents because _____.

Accepted Answer

A)   they have the exact same genotypes as their parents
B)   they inherit half of their genetic material from each parent
C)   they carry the same combinations of alleles that their parents have
D)   they inherit mutations that make their bodies appear identical to one or both parents
E)   the cells of embryos divide by meiosis,a process that yields genetic duplicates

Question 11

What is the principle of independent assortment?

Accepted Answer

A)   the principle that alleles of different genes are distributed together,as a package
B)   the principle wherein alleles of maternal and paternal genes are aligned in the cell during meiosis and separated independently of one another
C)   the principle that occurs only during meiosis II
D)   a process that only occurs if chromosome pairs are aligned in the center of the cell
E)   None of the above.

Question 12

What is meiosis?

Accepted Answer

A)   the specialized type of cellular division that generates haploid gametes
B)   a type of cellular division that contains two separate divisions,ultimately leading to the separation of sister chromatids
C)   a type of cellular division that aides in genetic diversity by containing both recombination and independent assortment
D)   A and B
E)   A and C

Question 13

Two normal individuals have a child who has cystic fibrosis,an autosomal recessive disease.What were the chances of this happening? (Draw a Punnett square to help you determine the answer. )

Accepted Answer

A)   1:4 chance
B)   2:4 chance
C)   3:4 chance
D)   4:4 chance
E)   less than 1:4 chance

Question 14

Independent assortment means

Accepted Answer

A)   only one allele actually makes protein while the other is inactive,and the one that's active is random and independent of other allele pairs.
B)   the segments of homologous chromosomes that are exchanged are random and independent of other segments.
C)   only some chromosomes are duplicated,and which chromosomes are duplicated is random and independent of other chromosomes.
D)   which sperm cell carries an X chromosome and which carries a Y chromosome is random and independent of the other sperm.
E)   homologous chromosomes segregate into daughter cells randomly and independently of one another.

Question 15

In a cross between two heterozygous parents for two genes,what is the chance that any progeny will be homozygous recessive for both traits?

Accepted Answer

A)   9:16
B)   1:16
C)   1:4
D)   1:1
E)   1:32

Question 16

How is genetic diversity created in meiosis I?

Accepted Answer

A)   The sister chromatids line up in the middle of the cell.
B)   Meiosis I results in a mixture of 46 chromosomes that are different from one another.
C)   Recombination of sister chromatids occurs in meiosis I.
D)   Each cell gets only one copy of each chromosome at the end of meiosis I.
E)   None of the above.

Question 17

What two processes occur during meiosis to aide in genetic diversity?

Accepted Answer

A)   recombination and dependent assortment
B)   independent assortment and recombination
C)   meiosis I and II
D)   All of the above.
E)   None of the above.

Question 18

Which of the following puts the events of meiosis in the correct order?

Accepted Answer

A)   chromosomes duplicate,crossing over,homologous chromosomes separate,sister chromatids separate
B)   chromosomes duplicate,crossing over,sister chromatids separate,homologous chromosomes separate
C)   homologous chromosomes separate,chromosomes duplicate,crossing over,sister chromatids separate
D)   crossing over,chromosomes duplicate,homologous chromosomes separate,sister chromatids separate
E)   crossing over,chromosomes duplicate,sister chromatids separate,homologous chromosomes separate

Question 19

What is the most common mutation found in cystic fibrosis?

Accepted Answer

A)   Three nucleotides in the CFTR gene are deleted on chromosome 3.
B)   Two nucleotides are deleted in the CFTR gene on chromosome 7.
C)   Three nucleotides are deleted in the CFTR gene on chromosome 7.
D)   The entire gene is deleted.
E)   None of the above.

Question 20

The most common CF allele on chromosome 7 is

Accepted Answer

A)   a three-base-pair deletion.
B)   a three-codon deletion.
C)   a three-amino-acid deletion.
D)   a single base pair deletion.
E)   a frameshift mutation.

Exam 11: Simple Inheritance and Meiosis

What is meiosis?

Correct AnswerverifiedShow Answer

How are gametes different from the rest of the body's cells?

Correct AnswerverifiedShow Answer

The appearance of an organism is known as its

Correct AnswerverifiedShow Answer

What two processes occur during meiosis to aide in genetic diversity?

Correct AnswerverifiedShow Answer

How is genetic diversity created in meiosis I?

Correct AnswerverifiedShow Answer

What is the most common mutation found in cystic fibrosis?

Correct AnswerverifiedShow Answer

What is the process where maternal and paternal chromosomes exchange genetic material?

Correct AnswerverifiedShow Answer

The process responsible for making chromosomes that have pieces taken from two different chromosomes is called

Correct AnswerverifiedShow Answer

Two people with Huntington disease,an autosomal dominant disorder,have a son.What are the chances he will get the disease? (Draw a Punnett square to help you determine the answer. )

Correct AnswerverifiedShow Answer

Two normal individuals have a child who has cystic fibrosis,an autosomal recessive disease.What were the chances of this happening? (Draw a Punnett square to help you determine the answer. )

Correct AnswerverifiedShow Answer

In order for a child to develop cystic fibrosis _____.

Correct AnswerverifiedShow Answer

Both parents have one copy of a dominant allele for Gene 87 and one recessive allele for Gene 87.What is the chance that their children will inherit the recessive condition (two copies of Gene 87) ? You may need to draw a Punnett square to figure this out.

Correct AnswerverifiedShow Answer

What is the difference between meiosis I and II?

Correct AnswerverifiedShow Answer

What is the principle of independent assortment?

Correct AnswerverifiedShow Answer

Is a change in nucleotide sequence always detrimental?

Correct AnswerverifiedShow Answer

The most common CF allele on chromosome 7 is

Correct AnswerverifiedShow Answer

Which of the following puts the events of meiosis in the correct order?

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Independent assortment means

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In a cross between two heterozygous parents for two genes,what is the chance that any progeny will be homozygous recessive for both traits?

Correct AnswerverifiedShow Answer

Children often have many of the phenotypes of their parents because _____.

Correct AnswerverifiedShow Answer

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