Question 1

A monohybrid cross is a mating between two individuals that are both

Accepted Answer

A) homozygous for one gene. 
B) heterozygous for two genes. 
C) homozygous for two genes. 
D) heterozygous for one gene. 
E) No answer is correct. 
A) homozygous for one gene. 
B) heterozygous for two genes. 
C) homozygous for two genes. 
D) heterozygous for one gene. 
E) No answer is correct.

Question 2

The most common phenotype or allele for a gene in a population is referred to as

Accepted Answer

A) the wild type. 
B) the dominant population. 
C) the recessive population. 
D) the P generation. 
E) the F1 generation. 
A) the wild type. 
B) the dominant population. 
C) the recessive population. 
D) the P generation. 
E) the F1 generation.

Question 3

If you cross two pea plants,one with green peas and the other with yellow peas,and all of the offspring have yellow peas,you conclude

Accepted Answer

A) green is dominant over yellow. 
B) yellow and green are codominant. 
C) yellow is incompletely dominant over green. 
D) yellow is dominant over green. 
E) color is random in pea plants. 
A) green is dominant over yellow. 
B) yellow and green are codominant. 
C) yellow is incompletely dominant over green. 
D) yellow is dominant over green. 
E) color is random in pea plants.

Question 4

Hemophilia A is an X-linked recessive disorder.What is the probability that a son will have hemophilia if the parents are a normal man and a woman who is a carrier?

Accepted Answer

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

Question 5

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 6

When Mendel crossed tall (Tt)plants with tall (Tt)plants the offspring

Accepted Answer

A) did not grow and reproduce. 
B) were always short. 
C) were always tall. 
D) were always medium height. 
E) were mostly tall individuals and a few short individuals. 
A) did not grow and reproduce. 
B) were always short. 
C) were always tall. 
D) were always medium height. 
E) were mostly tall individuals and a few short individuals.

Question 7

The environment only rarely affects gene expression.

Accepted Answer

A) True 
 B)False

Question 8

If an individual is heterozygous for a particular trait

Accepted Answer

A) each parent contributed a different allele for that trait. 
B) each parent contributed the same allele for that trait. 
C) one parent contributed two different alleles for that trait. 
D) one parent contributed two copies of the same allele for that trait. 
E) a mutation must have occurred. 
A) each parent contributed a different allele for that trait. 
B) each parent contributed the same allele for that trait. 
C) one parent contributed two different alleles for that trait. 
D) one parent contributed two copies of the same allele for that trait. 
E) a mutation must have occurred.

Question 9

Crossing over is more likely to separate genes on a chromosome if they are

Accepted Answer

A) close together. 
B) far apart. 
C) recessive genes. 
D) dominant genes. 
E) mutated genes. 
A) close together. 
B) far apart. 
C) recessive genes. 
D) dominant genes. 
E) mutated genes.

Question 10

Hemophilia A is caused by

Accepted Answer

A) an X-linked recessive disorder causing a defective blood clotting protein. 
B) an Y-linked recessive disorder. 
C) a defective neuron response. 
D) an X-linked dominant disorder causing a defective blood clotting protein. 
E) an X-linked dominant disorder. 
A) an X-linked recessive disorder causing a defective blood clotting protein. 
B) an Y-linked recessive disorder. 
C) a defective neuron response. 
D) an X-linked dominant disorder causing a defective blood clotting protein. 
E) an X-linked dominant disorder.

Question 11

Phenotype means

Accepted Answer

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

Question 12

Autosomes

Accepted Answer

A) are chromosomes that are the same for both sexes. 
B) include the Y chromosome in humans. 
C) include the X chromosome in humans. 
D) are the sex chromosomes. 
E) All answers are correct. 
A) are chromosomes that are the same for both sexes. 
B) include the Y chromosome in humans. 
C) include the X chromosome in humans. 
D) are the sex chromosomes. 
E) All answers are correct.

Question 13

A male expresses

Accepted Answer

A) only the dominant alleles on his X chromosome. 
B) both the dominant and recessive alleles on his X chromosome. 
C) only the homozygous recessive alleles on his X chromosome. 
D) none of the alleles on his X chromosome. 
E) only the homozygous dominant alleles on his X chromosomE. 
A) only the dominant alleles on his X chromosome. 
B) both the dominant and recessive alleles on his X chromosome. 
C) only the homozygous recessive alleles on his X chromosome. 
D) none of the alleles on his X chromosome. 
E) only the homozygous dominant alleles on his X chromosomE.

Question 14

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 15

The "P" in "P generation" refers to

Accepted Answer

A) pure breeding. 
B) parental. 
C) potential offspring. 
D) recessive allele. 
E) All answers are correct. 
A) pure breeding. 
B) parental. 
C) potential offspring. 
D) recessive allele. 
E) All answers are correct.

Question 16

The chromosome that determines whether a human is male or female is

Accepted Answer

A) the X chromosome. 
B) chromosome number 21. 
C) the group of autosomes known as the SRY group. 
D) chromosome number 22. 
E) the Y chromosomE. 
A) the X chromosome. 
B) chromosome number 21. 
C) the group of autosomes known as the SRY group. 
D) chromosome number 22. 
E) the Y chromosomE.

Question 17

Two alleles of each gene are packaged into separate gametes and they move apart from each other during gamete formation summarizes Mendel's

Accepted Answer

A) law of segregation. 
B) law of random fertilization. 
C) law of population dynamics. 
D) law of crossing over. 
E) law of independent assortment. 
A) law of segregation. 
B) law of random fertilization. 
C) law of population dynamics. 
D) law of crossing over. 
E) law of independent assortment.

Question 18

A test cross is a mating of an individual with an unknown genotype and an individual that

Accepted Answer

A) is heterozygous. 
B) is homozygous dominant. 
C) is homozygous recessive. 
D) has any known genotype. 
E) is the wild typE. 
A) is heterozygous. 
B) is homozygous dominant. 
C) is homozygous recessive. 
D) has any known genotype. 
E) is the wild typE.

Question 19

Adult female bollworm moths lay eggs on cotton bolls.These eggs then hatch and grow into caterpillars that eat the seeds of the boll.The eggs and sperm are produced by

Accepted Answer

A) meiosis. 
B) mitosis. 
C) fertilization. 
D) crossing over. 
E) mutation. 
A) meiosis. 
B) mitosis. 
C) fertilization. 
D) crossing over. 
E) mutation.

Question 20

Yellow peas are an example of

Accepted Answer

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

Exam 10: Patterns of Inheritance

A monohybrid cross is a mating between two individuals that are both

The most common phenotype or allele for a gene in a population is referred to as

If you cross two pea plants,one with green peas and the other with yellow peas,and all of the offspring have yellow peas,you conclude

Hemophilia A is an X-linked recessive disorder.What is the probability that a son will have hemophilia if the parents are a normal man and a woman who is a carrier?

Mendel called a trait that is masked

When Mendel crossed tall (Tt)plants with tall (Tt)plants the offspring

The environment only rarely affects gene expression.

If an individual is heterozygous for a particular trait

Crossing over is more likely to separate genes on a chromosome if they are

Hemophilia A is caused by

Phenotype means

Autosomes

A male expresses

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

The "P" in "P generation" refers to

The chromosome that determines whether a human is male or female is

Two alleles of each gene are packaged into separate gametes and they move apart from each other during gamete formation summarizes Mendel's

A test cross is a mating of an individual with an unknown genotype and an individual that

Adult female bollworm moths lay eggs on cotton bolls.These eggs then hatch and grow into caterpillars that eat the seeds of the boll.The eggs and sperm are produced by

Yellow peas are an example of

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