Question 1

A man with blood type AB could NOT be the father of a child with

Accepted Answer

A)  blood type A.
B)  blood type B.
C)  blood type AB.
D)  blood type O.
E)  A man with blood type AB can have a child of any blood type.F) C) and D)
G) B) and D)

Question 2

Mendel carried out most of his research with

Accepted Answer

A)   livestock.
B)   pea plants.
C)   guinea pigs.
D)   fruit flies.
E)   bacteria.F) C) and D)
G) B) and C)

Question 3

In cattle,consider that the lack of horns is dominant to the presence of horns.A bull without horns is crossed with a horned cow.Of four offspring,one is horned and the other three lack horns.The bull is

Accepted Answer

A)   homozygous dominant.
B)   homozygous recessive.
C)   heterozygous.
D)   heterozygous dominant.
E)   heterozygous recessive.F) A) and E)
G) None of the above

Question 4

If you were to breed a black male guinea pig to a brown female guinea pig in an attempt to determine which one was homozygous dominant and which one was homozygous recessive,how could you be certain that the guinea pigs are truly homozygous?

Accepted Answer

A)   The guinea pigs would be homozygous for black (or brown)  coat color if each strain could be bred for many generations and only black (or brown)  colored offspring were produced.
B)   If the immediate parents of the black (or brown)  guinea pigs were both of that color, it proves they are homozygous.
C)   If a cross between the black and brown guinea pig produced four all black offspring, the black guinea pig would have to be homozygous for black coat color.
D)   If a cross between the black and brown guinea pig produced four all black offspring, this would prove the black guinea pig was recessive.
E)   Only microscopic examination of the guinea pig's genes could absolutely confirm homozygosity.F) B) and C)
G) A) and B)

Question 5

The leaves of a maple tree vary in size depending on the location of the leaves on the tree.Those growing at the outer region of the tree tend to be smaller than those growing closer to the trunk of the tree.This allows leaves that are growing in the shade to have a larger surface area.This show that genes have the ability to

Accepted Answer

A)   Respond to environmental factors
B)   Show two different genetic variations
C)   Be turned off if they are not needed
D)   Choose whether or not they are expressed
E)   Mutated by exposure to sunlightF) B) and D)
G) B) and C)

Question 6

Which genetic disorder is associated with a defect in the elastic connective tissue protein called fibrillin?

Accepted Answer

A)   Marfan syndrome
B)   Huntington disease
C)   Sickle cell disease
D)   Phenylketonuria (PKU) 
E)   Cystic fibrosis (CF) F) A) and D)
G) B) and E)

Question 7

Two parents with widow's peak and short fingers have a child with a continuous hairline and long fingers.What are the genotypes of the two parents? (W = widow's peak; S = short fingers)

Accepted Answer

A)   WWSS x wwss
B)   wwss x WWSS
C)   WWss x WWss
D)   WwSs x WwSs
E)   WwSs x wwssF) None of the above
G) A) and D)

Question 8

Indicate the genotypic and phenotypic ratios that you could expect if an individual who is heterozygous for Huntington disease has children with a normal individual.

Accepted Answer

The individual who is heterozygous for H...

Question 9

When two or more sets of alleles affect the same trait in an additive fashion,it is termed

Accepted Answer

A)   single trait cross.
B)   double trait cross.
C)   codominant.
D)   incomplete dominance.
E)   polygenic inheritance.F) B) and D)
G) A) and E)

Question 10

Which of the following is an example of the blending of phenotypes?

Accepted Answer

A)   codominance
B)   sex-linked inheritance
C)   polygenic inheritance
D)   simple Mendelian inheritance
E)   incomplete dominanceF) A) and C)
G) A) and D)

Question 11

In humans,assume red hair is recessive to dark hair.What are the chances of a dark-haired couple having a red-haired child if each had a red-haired parent?

Accepted Answer

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

Question 12

If one parent has type B blood and the other has type AB,what type might the child have?

Accepted Answer

A)  A or O only
B)  B or O only
C)  A or B only
D)  A,B,AB only
E)  A,B,O,or ABF) A) and D)
G) None of the above

Question 13

Which of the following crosses will yield 4 phenotypes in the 1:1:1:1 ratio?

Accepted Answer

A)   RRYY x RRYY
B)   RRYY x rryy
C)   RrYy x RrYy
D)   RrYy x rryy
E)   rryy x rryyF) A) and D)
G) B) and C)

Question 14

You have two true-breeding rose bushes,one with red flowers and one with white flowers,a cross between these two roses yields a bush with pink flowers.What condition does this demonstrate?

Accepted Answer

A)   Codominance
B)   Incomplete dominance
C)   Environmental effects
D)   Polygenetic inheritance
E)   Monohybrid inheritanceF) D) and E)
G) A) and C)

Question 15

In which kind of cross would you expect to have your actual results match the predicted results 100% of the time the cross is made?

Accepted Answer

A)   monohybrid cross
B)   dihybrid cross
C)   test cross
D)   independent assortment cross
E)   crosses of differing genotypes result in differing answers-no cross will produce expected ratios every timeF) C) and E)
G) B) and C)

Question 16

If you had a black male guinea pig and a brown female guinea pig,but you didn't know which was the dominant characteristic,how would you find out the dominant color?

Accepted Answer

A)   Mate them and see what color the offspring are-that will be the dominant color.
B)   Mate them and see what color the offspring are-the other will be the dominant color.
C)   Mate them, then mate their offspring to see what color the next generation is-that will be the dominant color.
D)   Mate them together, then mate their offspring to see what color the next generation is-the other color will be the dominant color.
E)   The dominant color could not be determined by mating the two, then mating their offspring; further generations would have to be produced to determine the dominant color.F) B) and E)
G) All of the above

Question 17

In a testcross,an organism with a dominant phenotype,but unknown genotype is crossed with which of the following to establish its genotype?

Accepted Answer

A)   homozygous dominant
B)   heterozygous
C)   homozygous recessive
D)   heterozygous dominant
E)   monohybrid dominantF) C) and D)
G) A) and C)

Question 18

In 1940,two researchers named Weiner and Landsteiner discovered that about 85 percent of the human population sampled possessed a blood cell protein called the Rh factor.The presence of Rh factor was labeled Rh positive (Rh+) and was found to be dominant over the absence of the blood factor (Rh-) .Under normal Mendelian inheritance,which of the following statements is/are false?

Accepted Answer

A)   Two Rh+ parents could have an Rh- child.
B)   Two Rh- parents could have an Rh+ child.
C)   An Rh- child would require that both parents be carriers of at least one Rh- allele.
D)   It is possible with just one pair of parents to have children where some siblings are Rh- and some are Rh+.
E)   Two Rh+ parents can have Rh- or Rh + children.F) A) and E)
G) A) and B)

Question 19

Which of the following crosses will yield four phenotypes in a ratio of 9:3:3:1?

Accepted Answer

A)   RRYY x RRYY
B)   RRYY x rryy
C)   RrYy x RrYy
D)   RrYy x rryy
E)   rryy x rryyF) D) and E)
G) A) and D)

Question 20

Humans can have any of several eye colors,this is because we possess a variety of

Accepted Answer

A)   particulates
B)   genotypes
C)   loci
D)   alleles
E)   homologousF) A) and B)
G) C) and D)

Exam 23: Patterns of Gene Inheritance

Two parents with widow's peak and short fingers have a child with a continuous hairline and long fingers.What are the genotypes of the two parents? (W = widow's peak; S = short fingers)

Correct Answer
verified

Humans can have any of several eye colors,this is because we possess a variety of

Correct Answer
verified

Which of the following crosses will yield four phenotypes in a ratio of 9:3:3:1?

Correct Answer
verified

In which kind of cross would you expect to have your actual results match the predicted results 100% of the time the cross is made?

Correct Answer
verified

Indicate the genotypic and phenotypic ratios that you could expect if an individual who is heterozygous for Huntington disease has children with a normal individual.

Correct Answer
verified
The individual who is heterozygous for H...
View Answer

If you were to breed a black male guinea pig to a brown female guinea pig in an attempt to determine which one was homozygous dominant and which one was homozygous recessive,how could you be certain that the guinea pigs are truly homozygous?

Correct Answer
verified

Which of the following is an example of the blending of phenotypes?

Correct Answer
verified

When two or more sets of alleles affect the same trait in an additive fashion,it is termed

Correct Answer
verified

If you had a black male guinea pig and a brown female guinea pig,but you didn't know which was the dominant characteristic,how would you find out the dominant color?

Correct Answer
verified

In a testcross,an organism with a dominant phenotype,but unknown genotype is crossed with which of the following to establish its genotype?

Correct Answer
verified

Correct Answer
verified

If one parent has type B blood and the other has type AB,what type might the child have?

Correct Answer
verified

Correct Answer
verified

In cattle,consider that the lack of horns is dominant to the presence of horns.A bull without horns is crossed with a horned cow.Of four offspring,one is horned and the other three lack horns.The bull is

Correct Answer
verified

Which of the following crosses will yield 4 phenotypes in the 1:1:1:1 ratio?

Correct Answer
verified

In humans,assume red hair is recessive to dark hair.What are the chances of a dark-haired couple having a red-haired child if each had a red-haired parent?

Correct Answer
verified

You have two true-breeding rose bushes,one with red flowers and one with white flowers,a cross between these two roses yields a bush with pink flowers.What condition does this demonstrate?

Correct Answer
verified

Which genetic disorder is associated with a defect in the elastic connective tissue protein called fibrillin?

Correct Answer
verified

Mendel carried out most of his research with

Correct Answer
verified

A man with blood type AB could NOT be the father of a child with

Correct Answer
verified

Exam 23: Patterns of Gene Inheritance

Two parents with widow's peak and short fingers have a child with a continuous hairline and long fingers.What are the genotypes of the two parents? (W = widow's peak; S = short fingers)

Correct AnswerverifiedShow Answer

Humans can have any of several eye colors,this is because we possess a variety of

Correct AnswerverifiedShow Answer

Which of the following crosses will yield four phenotypes in a ratio of 9:3:3:1?

Correct AnswerverifiedShow Answer

In which kind of cross would you expect to have your actual results match the predicted results 100% of the time the cross is made?

Correct AnswerverifiedShow Answer

Indicate the genotypic and phenotypic ratios that you could expect if an individual who is heterozygous for Huntington disease has children with a normal individual.

Correct AnswerverifiedThe individual who is heterozygous for H...View AnswerShow Answer

If you were to breed a black male guinea pig to a brown female guinea pig in an attempt to determine which one was homozygous dominant and which one was homozygous recessive,how could you be certain that the guinea pigs are truly homozygous?

Correct AnswerverifiedShow Answer

Which of the following is an example of the blending of phenotypes?

Correct AnswerverifiedShow Answer

When two or more sets of alleles affect the same trait in an additive fashion,it is termed

Correct AnswerverifiedShow Answer

If you had a black male guinea pig and a brown female guinea pig,but you didn't know which was the dominant characteristic,how would you find out the dominant color?

Correct AnswerverifiedShow Answer

In a testcross,an organism with a dominant phenotype,but unknown genotype is crossed with which of the following to establish its genotype?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

If one parent has type B blood and the other has type AB,what type might the child have?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In cattle,consider that the lack of horns is dominant to the presence of horns.A bull without horns is crossed with a horned cow.Of four offspring,one is horned and the other three lack horns.The bull is

Correct AnswerverifiedShow Answer

Which of the following crosses will yield 4 phenotypes in the 1:1:1:1 ratio?

Correct AnswerverifiedShow Answer

In humans,assume red hair is recessive to dark hair.What are the chances of a dark-haired couple having a red-haired child if each had a red-haired parent?

Correct AnswerverifiedShow Answer

You have two true-breeding rose bushes,one with red flowers and one with white flowers,a cross between these two roses yields a bush with pink flowers.What condition does this demonstrate?

Correct AnswerverifiedShow Answer

Which genetic disorder is associated with a defect in the elastic connective tissue protein called fibrillin?

Correct AnswerverifiedShow Answer

Mendel carried out most of his research with

Correct AnswerverifiedShow Answer

A man with blood type AB could NOT be the father of a child with

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The individual who is heterozygous for H...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified