Question 1

Yellow peas are an example of

Accepted Answer

A)  a phenotype. 
B)  a genotype. 
C)  an allele. 
D)  a gene. 
E)  a locus. 
A)  a phenotype. 
B)  a genotype. 
C)  an allele. 
D)  a gene. 
E)  a locus.

Question 2

Which gametes can a RrYy plant produce?

Accepted Answer

A)  Rr or Yy 
B)  RY or ry 
C)  RrYy 
D)  RY, Ry, rY, or ry 
E)  R or r 
A)  Rr or Yy 
B)  RY or ry 
C)  RrYy 
D)  RY, Ry, rY, or ry 
E)  R or r

Question 3

In the ABO blood type system,the Iᴬ allele is ________ with the Iᴮ allele.

Accepted Answer

A)  dominant 
B)  codominant 
C)  recessive 
D)  homologous 
E)  heterologous 
A)  dominant 
B)  codominant 
C)  recessive 
D)  homologous 
E)  heterologous

Question 4

Of all the people who have studied inheritance,the person who made the most lasting impression on the science of genetics is

Accepted Answer

A)  Charles Darwin. 
B)  Robert Hooke. 
C)  King George III. 
D)  Frederick Griffith. 
E)  Gregor Mendel. 
A)  Charles Darwin. 
B)  Robert Hooke. 
C)  King George III. 
D)  Frederick Griffith. 
E)  Gregor Mendel.

Question 5

Phenotype means the

Accepted Answer

A)  number of gametes in an individual. 
B)  number of chromosomes in an individual. 
C)  combination of alleles in an individual. 
D)  genes an individual has. 
E)  observable expression of the genes in an individual. 
A)  number of gametes in an individual. 
B)  number of chromosomes in an individual. 
C)  combination of alleles in an individual. 
D)  genes an individual has. 
E)  observable expression of the genes in an individual.

Question 6

If you cross two heterozygous Yy pea plants,what proportion of the offspring will be the dominant color yellow?

Accepted Answer

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

Question 7

If the two alleles for a particular gene are identical the gene pair is

Accepted Answer

A)  homozygous. 
B)  homologous. 
C)  heterozygous. 
D)  dominant. 
E)  recessive. 
A)  homozygous. 
B)  homologous. 
C)  heterozygous. 
D)  dominant. 
E)  recessive.

Question 8

Linked genes,by definition,are genes that

Accepted Answer

A)  are found on the same chromosome. 
B)  have no alleles. 
C)  are found in the same species. 
D)  have more alleles than usual. 
E)  are found in different daughter cells. 
A)  are found on the same chromosome. 
B)  have no alleles. 
C)  are found in the same species. 
D)  have more alleles than usual. 
E)  are found in different daughter cells.

Question 9

On a diagram of linked genes on a chromosome,the distance between the genes would be based on the frequency of crossing over between the genes during meiosis.

Accepted Answer

A) True 
 B)False

Question 10

Sexual reproduction passes on hereditary information through

Accepted Answer

A)  gametes produced by mitosis. 
B)  gametes produced by meiosis. 
C)  only autosomes. 
D)  only sex chromosomes. 
E)  only linked genes. 
A)  gametes produced by mitosis. 
B)  gametes produced by meiosis. 
C)  only autosomes. 
D)  only sex chromosomes. 
E)  only linked genes.

Question 11

In humans skin color widely varies.This is because skin color is

Accepted Answer

A)  a polygenic trait. 
B)  influenced by environmental changes like improvements in diet. 
C)  influenced by an X-linked gene. 
D)  influenced by a Y-linked gene. 
E)  influenced by crossing over. 
A)  a polygenic trait. 
B)  influenced by environmental changes like improvements in diet. 
C)  influenced by an X-linked gene. 
D)  influenced by a Y-linked gene. 
E)  influenced by crossing over.

Question 12

Mendel called a trait that is masked

Accepted Answer

A)  homozygous. 
B)  heterozygous. 
C)  dominant. 
D)  recessive. 
E)  No answer is correct. 
A)  homozygous. 
B)  heterozygous. 
C)  dominant. 
D)  recessive. 
E)  No answer is correct.

Question 13

If the probability of one genetic event is 1/2 and of another 1/6,then the probability of both occurring is 1/12.

Accepted Answer

A) True 
 B)False

Question 14

If a diploid cell has 14 chromosomes,it will have

Accepted Answer

A)  14 pairs of homologous chromosomes. 
B)  7 pairs of homologous chromatids. 
C)  14 pairs of homologous chromatids. 
D)  7 pairs of homologous chromosomes. 
E)  14 alleles. 
A)  14 pairs of homologous chromosomes. 
B)  7 pairs of homologous chromatids. 
C)  14 pairs of homologous chromatids. 
D)  7 pairs of homologous chromosomes. 
E)  14 alleles.

Question 15

If two genes are linked,they will appear to violate Mendel's law of segregation.

Accepted Answer

A) True 
 B)False

Question 16

Mendel's monohybrid cross of tall parents,each with the genotype Tt,resulted in a tall to short ratio of

Accepted Answer

A)  1:1. 
B)  1:2. 
C)  2:1. 
D)  3:1. 
E)  1:3. 
A)  1:1. 
B)  1:2. 
C)  2:1. 
D)  3:1. 
E)  1:3.

Question 17

A scientist wants to perform a monohybrid cross for stem length in pea plants that will show all possible genotypes in the progeny.Which pea plants will they cross?

Accepted Answer

A)  ttgg x ttgg 
B)  tt x tt 
C)  TT x TT 
D)  TTGG x TTGG 
E)  Tt x Tt 
A)  ttgg x ttgg 
B)  tt x tt 
C)  TT x TT 
D)  TTGG x TTGG 
E)  Tt x Tt

Question 18

If a healthy young couple are both carriers of cystic fibrosis,the chance that their future child will have this serious illness is

Accepted Answer

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

Question 19

In these data, the parental generation characteristics (resistant or susceptible) are shown at the top.
  
-In this figure,the F₁ generation shows mating of resistant bollworms (________)with susceptible heterozygous (________)bollworms.

Accepted Answer

A)  rr; Rr 
B)  rr; RR 
C)  RR; rr 
D)  Rr; rr 
E)  Rr; RR 
A)  rr; Rr 
B)  rr; RR 
C)  RR; rr 
D)  Rr; rr 
E)  Rr; RR

Question 20

If you cross two heterozygous (Yy)pea plants,what proportion of the offspring will be heterozygous?

Accepted Answer

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

Exam 10: Patterns of Inheritance

Yellow peas are an example of

Which gametes can a RrYy plant produce?

In the ABO blood type system,the Iᴬ allele is ________ with the Iᴮ allele.

Of all the people who have studied inheritance,the person who made the most lasting impression on the science of genetics is

Phenotype means the

If you cross two heterozygous Yy pea plants,what proportion of the offspring will be the dominant color yellow?

If the two alleles for a particular gene are identical the gene pair is

Linked genes,by definition,are genes that

On a diagram of linked genes on a chromosome,the distance between the genes would be based on the frequency of crossing over between the genes during meiosis.

Sexual reproduction passes on hereditary information through

In humans skin color widely varies.This is because skin color is

Mendel called a trait that is masked

If the probability of one genetic event is 1/2 and of another 1/6,then the probability of both occurring is 1/12.

If a diploid cell has 14 chromosomes,it will have

If two genes are linked,they will appear to violate Mendel's law of segregation.

Mendel's monohybrid cross of tall parents,each with the genotype Tt,resulted in a tall to short ratio of

A scientist wants to perform a monohybrid cross for stem length in pea plants that will show all possible genotypes in the progeny.Which pea plants will they cross?

If a healthy young couple are both carriers of cystic fibrosis,the chance that their future child will have this serious illness is

In these data, the parental generation characteristics (resistant or susceptible) are shown at the top. -In this figure,the F₁ generation shows mating of resistant bollworms (________)with susceptible heterozygous (________)bollworms.

If you cross two heterozygous (Yy)pea plants,what proportion of the offspring will be heterozygous?

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In these data, the parental generation characteristics (resistant or susceptible) are shown at the top. -In this figure,the F₁ generation shows mating of resistant bollworms ()with susceptible heterozygous ()bollworms.