Question 1

Given that bw and hv are closely linked,which of the following phenotypic ratios can you expect to find in the F2 generation?

Accepted Answer

A) 1 brown,heavy: 2 red,thin: 1 red,thin 
B) 1 brown,thin: 2 red,thin: 1 red,heavy 
C) 3 red,thin: 1 brown heavy 
D) 1 brown: 1 red: 1 heavy: 1 thin 
A) 1 brown,heavy: 2 red,thin: 1 red,thin 
B) 1 brown,thin: 2 red,thin: 1 red,heavy 
C) 3 red,thin: 1 brown heavy 
D) 1 brown: 1 red: 1 heavy: 1 thin

Question 2

Hemophilia is a

Accepted Answer

A) recessive condition. 
B) dominant condition. 
C) epistatic condition. 
D) codominant condition. 
E) condition that occurs with equal frequency in both sexes. 
A) recessive condition. 
B) dominant condition. 
C) epistatic condition. 
D) codominant condition. 
E) condition that occurs with equal frequency in both sexes.

Question 3

Which of the following will help you distinguish between the two final suspects?

Accepted Answer

A) single nucleotide polymorphisms (SNPs) 
B) human genetic map 
C) linkage data 
D) anonymous markers 
A) single nucleotide polymorphisms (SNPs) 
B) human genetic map 
C) linkage data 
D) anonymous markers

Question 4

One of the main reasons genes assort independently of one another is that

Accepted Answer

A) they produce unrelated traits. 
B) they produce related traits. 
C) they are on the same chromosome. 
D) they are different alleles. 
E) they are on different chromosomes. 
A) they produce unrelated traits. 
B) they produce related traits. 
C) they are on the same chromosome. 
D) they are different alleles. 
E) they are on different chromosomes.

Question 5

Genetic exchange between two arms of a chromosome pair is more likely to occur if the distance between the genes is great.It is called

Accepted Answer

A) epistasis. 
B) pleiotropy. 
C) crossing over. 
D) allelic exchange. 
E) mutation. 
A) epistasis. 
B) pleiotropy. 
C) crossing over. 
D) allelic exchange. 
E) mutation.

Question 6

How many Barr bodies does a normal human female contain in her cells?

Accepted Answer

A) 0 
B) 1 
C) 2 
D) 3 
A) 0 
B) 1 
C) 2 
D) 3

Question 7

In humans,the male has an X and Y sex chromosome.The human female has two X chromosomes.In birds,the female has a Z and a W sex chromosome while the male has two Z chromosomes.Which of the following statements is accurate about which parent controls the gender of the offspring?

Accepted Answer

A) In humans and birds the male controls the gender of all the offspring. 
B) In humans and birds the female controls the gender of all the offspring. 
C) In humans the male controls the gender of the offspring,and in birds the female controls the gender. 
D) In humans the female controls the gender of the offspring,and in birds the male controls the gender. 
E) Control of the gender of any human or bird offspring is related to the environmental conditions at the time of conception. 
A) In humans and birds the male controls the gender of all the offspring. 
B) In humans and birds the female controls the gender of all the offspring. 
C) In humans the male controls the gender of the offspring,and in birds the female controls the gender. 
D) In humans the female controls the gender of the offspring,and in birds the male controls the gender. 
E) Control of the gender of any human or bird offspring is related to the environmental conditions at the time of conception.

Question 8

The most common condition of trisomy,in which three copies of a chromosome are present instead of the normal two,is of chromosome

Accepted Answer

A) X. 
B) 13. 
C) 15. 
D) 18. 
E) 21. 
A) X. 
B) 13. 
C) 15. 
D) 18. 
E) 21.

Question 9

Of the 23 pairs of human chromosomes,22 pairs are similar in the location of genes and are found in both males and females.These are called _________.

Accepted Answer

A) chromosomes 
B) autosomes 
C) alleles 
D) gametes 
A) chromosomes 
B) autosomes 
C) alleles 
D) gametes

Question 10

If some alternative alleles with detrimental effects exist in significant proportions in populations,the condition is called

Accepted Answer

A) pleiotropy. 
B) a syndrome. 
C) epistasis. 
D) a genetic disorder. 
E) a genetic imbalancE. 
A) pleiotropy. 
B) a syndrome. 
C) epistasis. 
D) a genetic disorder. 
E) a genetic imbalancE.

Question 11

Why can't you use mitochondrial DNA to distinguish between these two suspects?

Accepted Answer

A) The sequence of mitochondrial DNA has not yet been determined. 
B) The brothers share the same mitochondrial DNA. 
C) There are no molecular techniques available that allow one to analyze mitochondrial DNA. 
D) Because mitochondrial DNA is inherited in a paternal pattern. 
A) The sequence of mitochondrial DNA has not yet been determined. 
B) The brothers share the same mitochondrial DNA. 
C) There are no molecular techniques available that allow one to analyze mitochondrial DNA. 
D) Because mitochondrial DNA is inherited in a paternal pattern.

Question 12

Which of the following statements about calico cats is false?

Accepted Answer

A) Calico cats can be male or female. 
B) The different colored fur is due to the inactivation of one X chromosome. 
C) The variation in coat color is an example of an epistatic interaction. 
D) Calico cats are genetic mosaics. 
A) Calico cats can be male or female. 
B) The different colored fur is due to the inactivation of one X chromosome. 
C) The variation in coat color is an example of an epistatic interaction. 
D) Calico cats are genetic mosaics.

Question 13

In humans,if a non-disjunction event led to an individual with a genotype of XO,they would

Accepted Answer

A) be female because they do not have a Y chromosome. 
B) be male because they only have one X chromosome. 
C) display both male and female characteristics. 
D) not survive. 
A) be female because they do not have a Y chromosome. 
B) be male because they only have one X chromosome. 
C) display both male and female characteristics. 
D) not survive.

Question 14

Amniocentesis is a procedure that is normally used

Accepted Answer

A) to reduce the risk of genetic disease. 
B) for gene therapy. 
C) to change the sex of the fetus. 
D) for diagnosis of genetic disorders. 
E) for nourishing the fetus. 
A) to reduce the risk of genetic disease. 
B) for gene therapy. 
C) to change the sex of the fetus. 
D) for diagnosis of genetic disorders. 
E) for nourishing the fetus.

Question 15

The clotting of blood depends upon a chain of reactions that involve many different proteins;a faulty gene for any one of these proteins gives rise to the disease called __________.

Accepted Answer

A) hemophilia 
B) HIV 
C) multiple sclerosis 
D) leukemia 
A) hemophilia 
B) HIV 
C) multiple sclerosis 
D) leukemia

Question 16

If an XY individual had a genetic disorder in which they were insensitive to androgens,their genotype and phenotype would be

Accepted Answer

A) XX,female. 
B) XX,male. 
C) XY,female. 
D) XY,male. 
A) XX,female. 
B) XX,male. 
C) XY,female. 
D) XY,male.

Question 17

Which of the following animals is a genetic male?

Accepted Answer

A) bird ZW 
B) grasshopper XO 
C) honeybee diploid 
D) Drosophila XXY 
A) bird ZW 
B) grasshopper XO 
C) honeybee diploid 
D) Drosophila XXY

Exam 13: Chromosomes Mapping and the Meiosis - Inheritance Connection

Given that bw and hv are closely linked,which of the following phenotypic ratios can you expect to find in the F2 generation?

Hemophilia is a

Which of the following will help you distinguish between the two final suspects?

One of the main reasons genes assort independently of one another is that

Genetic exchange between two arms of a chromosome pair is more likely to occur if the distance between the genes is great.It is called

How many Barr bodies does a normal human female contain in her cells?

In humans,the male has an X and Y sex chromosome.The human female has two X chromosomes.In birds,the female has a Z and a W sex chromosome while the male has two Z chromosomes.Which of the following statements is accurate about which parent controls the gender of the offspring?

The most common condition of trisomy,in which three copies of a chromosome are present instead of the normal two,is of chromosome

Of the 23 pairs of human chromosomes,22 pairs are similar in the location of genes and are found in both males and females.These are called _________.

If some alternative alleles with detrimental effects exist in significant proportions in populations,the condition is called

Why can't you use mitochondrial DNA to distinguish between these two suspects?

Which of the following statements about calico cats is false?

In humans,if a non-disjunction event led to an individual with a genotype of XO,they would

Amniocentesis is a procedure that is normally used

The clotting of blood depends upon a chain of reactions that involve many different proteins;a faulty gene for any one of these proteins gives rise to the disease called __________.

If an XY individual had a genetic disorder in which they were insensitive to androgens,their genotype and phenotype would be

Which of the following animals is a genetic male?

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Given that bw and hv are closely linked,which of the following phenotypic ratios can you expect to find in the F₂ generation?