Question 1

When Mendel crossed dark purple-flowered pea plants with white-flowered pea plants,he never got any pea plants with light purple flowers.This was counter to the

Accepted Answer

A) idea of acquired characteristic inheritance. 
B) theory of blending inheritance. 
C) the assumption of direct transmission of traits. 
D) the law of dominance. 
E) the laws of probability. 
A) idea of acquired characteristic inheritance. 
B) theory of blending inheritance. 
C) the assumption of direct transmission of traits. 
D) the law of dominance. 
E) the laws of probability. B

Question 2

What is the name of the cross that involves the mating of a hybrid F1 plant with a homozygous recessive plant for the same trait?

Accepted Answer

A) monohybrid cross 
B) dihybrid cross 
C) reciprocal cross 
D) test cross 
E) back cross 
A) monohybrid cross 
B) dihybrid cross 
C) reciprocal cross 
D) test cross 
E) back cross D

Question 3

A person who has lost a large amount of blood but is still alive is found in a wrecked automobile under a highway bridge.Several people are helping the paramedics load the victim into the ambulance.After the ambulance has departed for the hospital,you overhear the following conversation from the persons who helped the paramedics."I am certain that when that guy gets to the hospital,they will transfuse him with any blood that they have in the blood bank since he has lost so much blood." The other person says,"Yeah,I bet you're right!" Having had a biology course,you know which blood could be safely given to anyone.Select it below.

Accepted Answer

A) A 
B) B 
C) AB 
D) O 
A) A 
B) B 
C) AB 
D) O D

Question 4

Let P = purple flowers and p = white,and T = tall plants and t = dwarf.What would be the appearance of a plant with the genotype PpTt?

Accepted Answer

A) purple flowers,tall 
B) purple flowers,dwarf 
C) white flowers,tall 
D) white flowers,dwarf 
E) pale purple flowers,intermediate height 
A) purple flowers,tall 
B) purple flowers,dwarf 
C) white flowers,tall 
D) white flowers,dwarf 
E) pale purple flowers,intermediate height

Question 5

As the new technician in a lab that studies coat color in rodents,you are assigned the task of counting and recording the coat color of the F2 progeny of a dihybrid cross.Your results are: 18 agouti mice,6 black mice,8 albino mice.Based on this data,you conclude that coat color in rodents

Accepted Answer

A) involves an epistatic interaction. 
B) is determined by three different genes. 
C) depends on prenatal nutrition. 
D) involves incomplete dominance. 
A) involves an epistatic interaction. 
B) is determined by three different genes. 
C) depends on prenatal nutrition. 
D) involves incomplete dominance.

Question 6

How many different types of gametes can be formed by plants with a genotype of PpYYrrTt?

Accepted Answer

A) 2 
B) 4 
C) 8 
D) 16 
A) 2 
B) 4 
C) 8 
D) 16

Question 7

A diploid individual whose two copies of a given gene are the same.

Accepted Answer

A) genotype 
B) heterozygote 
C) homozygote 
D) phenotype 
A) genotype 
B) heterozygote 
C) homozygote 
D) phenotype

Question 8

One of the general principles of biology that was accepted before much was known about genetics was that

Accepted Answer

A) heredity occurs within species,and species "breed true." 
B) hybrids can form occasionally from any two parents. 
C) mythical monsters can no longer be found on Earth. 
D) traits are transmitted directly. 
E) traits of both parents are blended in the offspring. 
A) heredity occurs within species,and species "breed true." 
B) hybrids can form occasionally from any two parents. 
C) mythical monsters can no longer be found on Earth. 
D) traits are transmitted directly. 
E) traits of both parents are blended in the offspring.

Question 9

If an individual allele has more than one effect on the phenotype it is said to be

Accepted Answer

A) pleiotropic. 
B) epistatic. 
C) recessive. 
D) dominant. 
E) homozygotic. 
A) pleiotropic. 
B) epistatic. 
C) recessive. 
D) dominant. 
E) homozygotic.

Question 10

In a typical Mendel experiment on pea-seed color,if the dominant yellow seed-bearing plant was crossed with the recessive green seed-bearing plant,the F2 generation will show what ratio of each kind?

Accepted Answer

A) 1 yellow: 3 green 
B) 1 yellow: 1 green 
C) 3 yellow: 1 green 
D) seeds with patches of green and yellow color 
E) tall plants with yellow seeds and short plants with green seeds 
A) 1 yellow: 3 green 
B) 1 yellow: 1 green 
C) 3 yellow: 1 green 
D) seeds with patches of green and yellow color 
E) tall plants with yellow seeds and short plants with green seeds

Question 11

Why would a genetic counselor need to know how to construct a human pedigree?

Accepted Answer

A) A genetic counselor provides individuals and potential parents with the probabilities of inheriting a particular disease.An accurate pedigree is an essential part of establishing the correct probabilities. 
B) A genetic counselor provides individuals and potential parents with the probabilities of inheriting a particular disease.An accurate pedigree is not necessary in determining disease. 
C) A genetic counselor needs to know how to construct pedigrees to determine genotypes. 
A) A genetic counselor provides individuals and potential parents with the probabilities of inheriting a particular disease.An accurate pedigree is an essential part of establishing the correct probabilities. 
B) A genetic counselor provides individuals and potential parents with the probabilities of inheriting a particular disease.An accurate pedigree is not necessary in determining disease. 
C) A genetic counselor needs to know how to construct pedigrees to determine genotypes.

Question 12

ABO blood group expression is an example of

Accepted Answer

A) epistasis. 
B) dominance. 
C) recessiveness. 
D) multiple alleles. 
E) pleiotropy. 
A) epistasis. 
B) dominance. 
C) recessiveness. 
D) multiple alleles. 
E) pleiotropy.

Question 13

Mendel's observations that different pairs of genes assort independently of each other is known as Mendel's

Accepted Answer

A) First Law of Heredity. 
B) Pea Manifesto. 
C) Statement of Assortment Principle. 
D) Second Law of Heredity. 
E) Theory of Genetic IndependencE. 
A) First Law of Heredity. 
B) Pea Manifesto. 
C) Statement of Assortment Principle. 
D) Second Law of Heredity. 
E) Theory of Genetic IndependencE.

Question 14

Height and eye colors are two examples of continuous variation in humans.Whereas in pea plants the tall allele is dominant over the short allele,there are no intermediate heights in peas.Which of the following is the best explanation for the differences described above?

Accepted Answer

A) Humans are more advanced than pea plants;thus,the genetics of peas is much simpler than humans. 
B) The intermediate size pea plant seeds are aborted within the seedpod and thus will never develop. 
C) The intermediate size pea plant seeds have deleterious alleles that prevent them from germinating. 
D) Many genes,rather than one gene for a characteristic,control some variations in species. 
E) These variations in humans are affected by lack of dominance in the alleles that control these traits. 
A) Humans are more advanced than pea plants;thus,the genetics of peas is much simpler than humans. 
B) The intermediate size pea plant seeds are aborted within the seedpod and thus will never develop. 
C) The intermediate size pea plant seeds have deleterious alleles that prevent them from germinating. 
D) Many genes,rather than one gene for a characteristic,control some variations in species. 
E) These variations in humans are affected by lack of dominance in the alleles that control these traits.

Question 15

Alternate forms of the same gene are called ______.

Accepted Answer

A) crosses 
B) genotypes 
C) cofactors 
D) alleles 
A) crosses 
B) genotypes 
C) cofactors 
D) alleles

Question 16

Mendel performed reciprocal crosses in which he used pollen from a white-flowered plant to fertilize a purple-flowered plant and pollen from a purple-flowered plant to fertilize a white-flowered plant.What did these reciprocal crosses demonstrate?

Accepted Answer

A) The reciprocal crosses demonstrated that each parent made an unequal contribution to the offspring. 
B) The reciprocal crosses demonstrated that each parent made an equal contribution to the offspring. 
C) The reciprocal crosses demonstrated that each parent could made an equal contribution to the offspring,but this did not always occur. 
A) The reciprocal crosses demonstrated that each parent made an unequal contribution to the offspring. 
B) The reciprocal crosses demonstrated that each parent made an equal contribution to the offspring. 
C) The reciprocal crosses demonstrated that each parent could made an equal contribution to the offspring,but this did not always occur.

Question 17

Achondroplasia is a common form of dwarfism caused by autosomal dominant mutation in the fibroblast growth factor receptor gene 3.If a person with achondroplasia married and had children with a person of normal height,what is the probability that both their first child and second child would have achondroplasia?

Accepted Answer

A) 1/8 
B) 1/4 
C) 1/2 
D) 1 
A) 1/8 
B) 1/4 
C) 1/2 
D) 1

Question 18

Based on the inheritance pattern of the secretor trait,a secretor can have a genotype of

Accepted Answer

A) either Se/Se or Se/se. 
B) either Se/Se or Se/ns. 
C) Se/Se. 
D) se/se. 
A) either Se/Se or Se/se. 
B) either Se/Se or Se/ns. 
C) Se/Se. 
D) se/se.

Question 19

Mendel chose the garden pea for his work on inheritance for all of the following reasons except

Accepted Answer

A) he failed his examination for a teaching certificate. 
B) earlier investigators had shown segregation among the offspring. 
C) a large number of true breeding varieties were already available. 
D) the generation time was short;many offspring can be grown easily. 
E) he could choose to self- or cross-pollinatE. 
A) he failed his examination for a teaching certificate. 
B) earlier investigators had shown segregation among the offspring. 
C) a large number of true breeding varieties were already available. 
D) the generation time was short;many offspring can be grown easily. 
E) he could choose to self- or cross-pollinatE.

Question 20

Early geneticists demonstrated all of the following about inherited traits except

Accepted Answer

A) traits can be masked in some generations,but subsequently reappear unchanged in future generations. 
B) traits segregate among the offspring of a cross. 
C) certain traits are more likely to be represented than their alternatives. 
D) all traits breed true. 
A) traits can be masked in some generations,but subsequently reappear unchanged in future generations. 
B) traits segregate among the offspring of a cross. 
C) certain traits are more likely to be represented than their alternatives. 
D) all traits breed true.

Exam 12: Patterns of Inheritance

When Mendel crossed dark purple-flowered pea plants with white-flowered pea plants,he never got any pea plants with light purple flowers.This was counter to the

What is the name of the cross that involves the mating of a hybrid F1 plant with a homozygous recessive plant for the same trait?

Let P = purple flowers and p = white,and T = tall plants and t = dwarf.What would be the appearance of a plant with the genotype PpTt?

As the new technician in a lab that studies coat color in rodents,you are assigned the task of counting and recording the coat color of the F2 progeny of a dihybrid cross.Your results are: 18 agouti mice,6 black mice,8 albino mice.Based on this data,you conclude that coat color in rodents

How many different types of gametes can be formed by plants with a genotype of PpYYrrTt?

A diploid individual whose two copies of a given gene are the same.

One of the general principles of biology that was accepted before much was known about genetics was that

If an individual allele has more than one effect on the phenotype it is said to be

In a typical Mendel experiment on pea-seed color,if the dominant yellow seed-bearing plant was crossed with the recessive green seed-bearing plant,the F2 generation will show what ratio of each kind?

Why would a genetic counselor need to know how to construct a human pedigree?

ABO blood group expression is an example of

Mendel's observations that different pairs of genes assort independently of each other is known as Mendel's

Height and eye colors are two examples of continuous variation in humans.Whereas in pea plants the tall allele is dominant over the short allele,there are no intermediate heights in peas.Which of the following is the best explanation for the differences described above?

Alternate forms of the same gene are called ______.

Mendel performed reciprocal crosses in which he used pollen from a white-flowered plant to fertilize a purple-flowered plant and pollen from a purple-flowered plant to fertilize a white-flowered plant.What did these reciprocal crosses demonstrate?

Based on the inheritance pattern of the secretor trait,a secretor can have a genotype of

Mendel chose the garden pea for his work on inheritance for all of the following reasons except

Early geneticists demonstrated all of the following about inherited traits except

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What is the name of the cross that involves the mating of a hybrid F₁ plant with a homozygous recessive plant for the same trait?

As the new technician in a lab that studies coat color in rodents,you are assigned the task of counting and recording the coat color of the F₂ progeny of a dihybrid cross.Your results are: 18 agouti mice,6 black mice,8 albino mice.Based on this data,you conclude that coat color in rodents

In a typical Mendel experiment on pea-seed color,if the dominant yellow seed-bearing plant was crossed with the recessive green seed-bearing plant,the F₂ generation will show what ratio of each kind?