Question 1

Write 1 for haploid and 2 for diploid.
A. zygote __
B. sperm __
C. egg __
D. baby __
E. gamete __
F. human __
G. 2n __
H. n __

Accepted Answer

A.2,
B.1,

Question 2

You have two parental varieties of peas: tall plants with axial flowers and short plants with terminal flowers.When the short plants with terminal flowers variety were crossed with the tall plants with axial flowers variety,all of the offspring were tall plants and axial flowers.What characteristics are recessive?

Accepted Answer

A)  None. This is an example of incomplete dominance. 
B)  None. This is an example of codominance. 
C)  tall and short 
D)  tall and terminal 
E)  short and terminal 
A)  None. This is an example of incomplete dominance. 
B)  None. This is an example of codominance. 
C)  tall and short 
D)  tall and terminal 
E)  short and terminal

Question 3

The ability to roll your tongue into a U-shape is a recessively inherited trait.What are all the possible parental combinations that would produce a child heterozygous for this trait? List the parental combinations as [Parent 1 genotype] × [Parent 2 genotype].Use the letters "R" and "r" to designate dominant and recessive alleles,respectively.As an example,note that "RR × rr" is equivalent to "rr ×RR"; thus,you only need to list one,not both.

Accepted Answer

1.RR × Rr

Question 4

People with the same cystic fibrosis alleles at the CFTR site do not always exhibit the same symptoms-some are sicker than others.Which of the following best explains this?

Accepted Answer

A)  the influence of modifier genes 
B)  the influence of deletion genes 
C)  the presence of other genes that code for normal CFTR protein 
D)  the presence of another gene that fixes the deformed protein 
E)  worse symptoms in men than in women 
A)  the influence of modifier genes 
B)  the influence of deletion genes 
C)  the presence of other genes that code for normal CFTR protein 
D)  the presence of another gene that fixes the deformed protein 
E)  worse symptoms in men than in women

Question 5

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. 
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 6

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. 
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.

Question 7

In a cross between an individual with Huntington disease and an unaffected individual,what are the chances their progeny will have the disease,considering that it is a dominant trait?

Accepted Answer

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

Question 8

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. 
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 9

Achondroplasia is a type of dwarfism caused by a dominant allele.What is the probability that a child will have this type of dwarfism if the father is homozygous normal and the mother is homozygous for achondroplasia? Use a Punnett square to show your work and use the letters "D" and "d" to designate dominant and recessive alleles,respectively.

Accepted Answer

@#IMG-DLM& The child will have

Question 10

Crossing over occurs between

Accepted Answer

A)  maternal chromosomes. 
B)  sister chromatids. 
C)  nonsister chromatids. 
D)  paternal chromosomes. 
E)  homologous chromosomes. 
A)  maternal chromosomes. 
B)  sister chromatids. 
C)  nonsister chromatids. 
D)  paternal chromosomes. 
E)  homologous chromosomes.

Question 11

Which describes a genotype homozygous dominant for a single trait?

Accepted Answer

A)  AAaa 
B)  AABB 
C)  AA 
D)  Aa 
E)  aa 
A)  AAaa 
B)  AABB 
C)  AA 
D)  Aa 
E)  aa

Question 12

A mutation in a DNA coding region of a protein can cause

Accepted Answer

A)  a different amino acid at that position. 
B)  altered bonding between amino acids in the protein. 
C)  a change in the 3D shape of the protein. 
D)  no change in protein functionality. 
E)  All of the above. 
A)  a different amino acid at that position. 
B)  altered bonding between amino acids in the protein. 
C)  a change in the 3D shape of the protein. 
D)  no change in protein functionality. 
E)  All of the above.

Question 13

A woman who is blood type A gave birth to a child who is blood type O.The child's father is blood type O.Which of these three-mother,father,or child-is heterozygous for blood type? Use a Punnett square to explain.

Accepted Answer

Blood type is an example of codominance,

Question 14

Why is having two copies of every gene an advantage to only having one copy of a gene?

Accepted Answer

Having two copies of every gene is an ad

Question 15

You have two parental varieties of peas: tall plants with axial flowers and short plants with terminal flowers.When the short plants with terminal flowers variety were crossed with the tall plants with axial flowers variety,all of the offspring were tall plants and axial flowers.Show your Punnett square for this cross.

Accepted Answer

T = tall,t

Question 16

Humans have 23 pairs of chromosomes.How many possible ways can these be sorted out during independent assortment?

Accepted Answer

A)  more than 8 million ways 
B)  46 ways 
C)  23 ways 
D)  about 100 million ways 
E)  529 ways (23 × 23 ways) 
A)  more than 8 million ways 
B)  46 ways 
C)  23 ways 
D)  about 100 million ways 
E)  529 ways (23 × 23 ways)

Question 17

During the process of genetic recombination,

Accepted Answer

A)  maternal and paternal chromosomes pair and physically exchange DNA segments. 
B)  crossing over occurs between two nonsister chromatids. 
C)  DNA segments are exchanged between two nonsister chromatids during meiosis I. 
D)  None of the above. 
E)  All of the above. 
A)  maternal and paternal chromosomes pair and physically exchange DNA segments. 
B)  crossing over occurs between two nonsister chromatids. 
C)  DNA segments are exchanged between two nonsister chromatids during meiosis I. 
D)  None of the above. 
E)  All of the above.

Question 18

All of the following are TRUE of meiosis,EXCEPT

Accepted Answer

A)  recombination occurs during meiosis II. 
B)  the resulting cells contain 23 chromosomes. 
C)  there are two cell divisions. 
D)  one cell produces four cells. 
E)  homologous pairs separate during meiosis I. 
A)  recombination occurs during meiosis II. 
B)  the resulting cells contain 23 chromosomes. 
C)  there are two cell divisions. 
D)  one cell produces four cells. 
E)  homologous pairs separate during meiosis I.

Question 19

The deletion of a codon in the gene for CF causes the CFTR protein to

Accepted Answer

A)  stop being made. 
B)  become nonfunctional. 
C)  become more active. 
D)  become overexpressed. 
E)  become underexpressed. 
A)  stop being made. 
B)  become nonfunctional. 
C)  become more active. 
D)  become overexpressed. 
E)  become underexpressed.

Question 20

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 
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

Exam 11: Single-Gene Inheritance and Meiosis Rock for a Cause

Write 1 for haploid and 2 for diploid. A. zygote __ B. sperm __ C. egg __ D. baby __ E. gamete __ F. human __ G. 2n __ H. n __

People with the same cystic fibrosis alleles at the CFTR site do not always exhibit the same symptoms-some are sicker than others.Which of the following best explains this?

What is the most common mutation found in cystic fibrosis?

The most common CF allele on chromosome 7 is

In a cross between an individual with Huntington disease and an unaffected individual,what are the chances their progeny will have the disease,considering that it is a dominant trait?

Independent assortment means

Crossing over occurs between

Which describes a genotype homozygous dominant for a single trait?

A mutation in a DNA coding region of a protein can cause

A woman who is blood type A gave birth to a child who is blood type O.The child's father is blood type O.Which of these three-mother,father,or child-is heterozygous for blood type? Use a Punnett square to explain.

Why is having two copies of every gene an advantage to only having one copy of a gene?

Humans have 23 pairs of chromosomes.How many possible ways can these be sorted out during independent assortment?

During the process of genetic recombination,

All of the following are TRUE of meiosis,EXCEPT

The deletion of a codon in the gene for CF causes the CFTR protein to

What is the difference between meiosis I and II?

The Process of Science Java Report

Chemistry and Molecules of Life Mission to Mars

Cell Function and Structure Wonder Drug

Nutrition,metabolism,enzymes the Peanut Butter Project

Energy Flow and Photosynthesis the Future of Fuel

Dietary Energy and Cellular Respiration Supersize Me

DNA Structure and Replication Biologically Unique

Genes to Proteins Medicine From Milk

Cell Division and Mitosis Natures Pharmacy

Mutations and Cancer Fighting Fate

Complex Inheritance Qa: Genetics

Stem Cells and Cell Differentiation Grow Your Own

Natural Selection and Adaptation Bugs That Resist Drugs

A: Nonadaptive Evolution and Speciation Urban Evolution

B: Nonadaptive Evolution and Speciation Urban Evolution

Evidence for Evolution a Fish With Fingers

Life on Earth Qa: Evolution

Prokaryotic Diversity Lost City

A: Eukaryotic Diversity Rain Forest Riches

B: Eukaryotic Diversity Rain Forest Riches

Human Evolution Skin Deep

A: Population Ecology on the Tracks of Wolves and Moose

B: Population Ecology on the Tracks of Wolves and Moose

A: Community Ecology Whats Happening to Honey Bees

B: Community Ecology Whats Happening to Honey Bees

A: Ecosystem Ecology the Heat Is on

B: Ecosystem Ecology the Heat Is on

A: Sustainability the Makings of a Green City

B: Sustainability the Makings of a Green City

A: Overview of Physiology Man Versus Mountain

B: Overview of Physiology Man Versus Mountain

Digestive System Drastic Measures

A: Cardiovascular System Death in Bogalusa

B: Cardiovascular System Death in Bogalusa

Respiratory System Peak Performance

A: Central Nervous System Smoke on the Brain

B: Central Nervous System Smoke on the Brain

Reproductive System Too Many Multiples

Immune System Viral Mysteries

A: Plant Physiology

B: Plant Physiology

Filters

Write 1 for haploid and 2 for diploid. A. zygote B. sperm C. egg D. baby E. gamete F. human G. 2n H. n