Question 1

A man who does not suffer from sickle-cell anemia but is a carrier of the sickle-cell trait is married to a woman who is also a carrier for the sickle-cell trait. If they have a child, there is a ____ probability of that child suffering from sickle-cell anemia.

Accepted Answer

When both parents are carriers of the sickle-cell trait, there is a 25% chance that their child will inherit two copies of the sickle-cell gene (one from each parent) and thus suffer from sickle-cell anemia. This follows Mendelian inheritance patterns for a recessive trait.

Question 2

If the parents of a child have the following genotypes [Bb *Bb], what is the probability that they will have a child with the genotype [Bb]?

Accepted Answer

Given the parents' genotypes [Bb F1F1F1S1?F1F1F10 Bb], the only information relevant to determining the probability of having a child with the genotype [Bb] pertains to the Bb part of the genotype, as the rest of the genotype provided does not follow standard genetic notation and seems to be irrelevant or incorrectly formatted. Since both parents have the Bb genotype, there is a 1 in 2, or 50%, chance that they will pass on the B allele and the b allele to their child, resulting in a child with the Bb genotype. This is because each parent has a 50% chance of passing on either allele (B or b) to their offspring.

Question 3

If an individual has the genotype BbCc, how many different kinds of gametes can that individual produce?

Accepted Answer

Each gene segregates independently during gamete formation, so an individual with the genotype BbCc can produce four types of gametes: BC, Bc, bC, and bc.

Question 4

There are three alleles for blood type, IA and IB are both dominant to iO but IA is not dominant to IB. A man has type O blood. A woman has type A blood but her father had type B blood. If this man and this woman have children what are the possible genotypes of the offspring?

Accepted Answer

The man with type O blood has the genotype iOiO. The woman has type A blood but her father had type B blood, indicating she must carry the iO allele (inherited from her type O mother) and an IA allele (to express type A blood), making her genotype IAiO. Their children could inherit iO from both parents (iOiO) or IA from the mother and iO from the father (IAiO).

Question 5

If the parents of a child have the following genotypes [Bb * Bb], what is the probability that they will have a child with the genotype [BB]?

Accepted Answer

The probability of having a child with the genotype [BB] is 25% because each parent can contribute either a B or a b allele. The combination needed for a [BB] genotype is for both parents to contribute the B allele, which has a probability of 1/2 from each parent, making the overall probability 1/2 * 1/2 = 1/4 or 25%.

Question 6

If an individual has the genotype BbCC, how many different kinds of gametes can that individual produce?

Accepted Answer

The individual can produce two types of gametes because the Bb genotype can produce two different alleles (B and b), while the CC genotype can only produce one type of allele (C), leading to two combinations: BC and bC.

Question 7

The gene for color blindness is a recessive allele located on the X chromosome. If a color-blind man and a color-blind woman have one son and three daughters, how many will be color-blind?

Accepted Answer

Since the gene for color blindness is a recessive allele located on the X chromosome, and both parents are color-blind, all their children will inherit the X chromosome with the color blindness allele from their mother and the son will inherit the Y chromosome from his father, making all children color-blind.

Question 8

If in houseflies the allele for green eyes is dominant over the allele for white eyes, and a heterozygous green-eyed male is mated with a white-eyed female, what is the probability that they will have green-eyed offspring?

Accepted Answer

The heterozygous green-eyed male (Gw) mated with a white-eyed female (ww) can produce offspring with genotypes Gw (green-eyed) and ww (white-eyed) in a 1:1 ratio, making the probability of having green-eyed offspring 1/2.

Question 9

If parents with the following genotypes (AABb * aaBb) have offspring, what is the probability that they will have an offspring with the genotype (AaBB)?

Accepted Answer

The parent with genotype AABb can produce gametes with AB and Ab. The parent with genotype aaBb can produce gametes with aB and ab. The only way to get an offspring with genotype AaBB is by combining the Ab gamete from the first parent with the aB gamete from the second parent. Since each parent has a 1/2 chance of providing the needed gamete, the overall probability is 1/2 * 1/2 = 1/4.

Question 10

In fruit flies, males are determined by the presence of an X and Y chromosome; females are determined by two X chromosomes. The gene for eye color is located on the X chromosome and is absent from the Y chromosome. The allele for white eyes is recessive and the allele for red eyes is dominant. If a red-eyed male is mated with a white-eyed female, what is the probability that their male offspring will be white-eyed?

Accepted Answer

Since the gene for eye color is located on the X chromosome and males inherit their X chromosome from their mothers, all male offspring will inherit their X chromosome from the white-eyed female. Given that the white eye allele is recessive and present on the mother's X chromosome, and males only have one X chromosome, all male offspring will express the white-eyed phenotype.

Question 11

A research geneticist discovered that a particular trait is controlled by ______ she identified as B, b₁, b₂, b₃, b₄, b₅.

Accepted Answer

Alleles are different forms of a gene that arise by mutation and are found at the same place on a chromosome. The description given refers to different versions of a gene, indicating they are alleles.

Question 12

Humans have the diploid number of chromosomes, 2n = 46. This also indicates humans

Accepted Answer

Humans have two sets of chromosomes, one from each parent, which means they have two complete sets of genetic information, or two genomes.

Question 13

"This patient with Marfan syndrome has really long fingers and toes, and is exceptionally tall." This is a statement describing

Accepted Answer

Phenotype refers to the observable physical or physiological traits of an organism, which result from the interaction of its genotype with the environment. The description of long fingers and toes and exceptional height in a patient with Marfan syndrome is an observation of physical traits, thus it is describing the phenotype.

Question 14

"She is a carrier of the cystic fibrosis trait." This statement acknowledges that this person is

Accepted Answer

Being a carrier of the cystic fibrosis trait means the person has one normal allele and one mutated allele for the gene in question, making them heterozygous. Carriers typically do not show symptoms of the disease.

Question 15

When an organism has two different alleles for a given trait, the allele that is expressed, overshadowing the expression of the other allele, is said to be

Accepted Answer

Dominant alleles are expressed over recessive alleles when an organism has two different alleles for a given trait.

Question 16

"Two out of three times, they will pass on the trait." This is a statement of

Accepted Answer

This statement is an example of probability because it quantifies the likelihood (two out of three times) of an event (passing on the trait) occurring.

Question 17

"We are only going to trace this one trait from one generation to another." This statement would indicate that

Accepted Answer

The statement indicates that the researcher is focusing on a single trait, which aligns with the concept of a monohybrid cross, where only one trait is considered.

Question 18

When the two alleles C^R C^W are the genotype of an individual, that person displays features of both alleles. This is known as

Accepted Answer

Codominance occurs when both alleles in a genotype are fully expressed, allowing the individual to display features of both alleles.

Question 19

Geneticists use this term when explaining how genetic information is converted into physical features of a cell or organism.

Accepted Answer

Gene expression is the process by which the information encoded in a gene is used to direct the assembly of a protein molecule, ultimately determining the physical features of a cell or organism.

Question 20

"She is a carrier of the cystic fibrosis trait." This statement acknowledges that this person

Accepted Answer

Being a carrier of the cystic fibrosis trait means the person has one normal allele and one mutated allele for the gene responsible for cystic fibrosis, making them heterozygous for the trait. They do not exhibit the disease symptoms but can pass the mutated gene to their offspring.

Quiz 10: Patterns of Inheritance

A man who does not suffer from sickle-cell anemia but is a carrier of the sickle-cell trait is married to a woman who is also a carrier for the sickle-cell trait. If they have a child, there is a ____ probability of that child suffering from sickle-cell anemia.

If the parents of a child have the following genotypes [Bb *Bb], what is the probability that they will have a child with the genotype [Bb]?

If an individual has the genotype BbCc, how many different kinds of gametes can that individual produce?

There are three alleles for blood type, IA and IB are both dominant to iO but IA is not dominant to IB. A man has type O blood. A woman has type A blood but her father had type B blood. If this man and this woman have children what are the possible genotypes of the offspring?

If the parents of a child have the following genotypes [Bb * Bb], what is the probability that they will have a child with the genotype [BB]?

If an individual has the genotype BbCC, how many different kinds of gametes can that individual produce?

The gene for color blindness is a recessive allele located on the X chromosome. If a color-blind man and a color-blind woman have one son and three daughters, how many will be color-blind?

If in houseflies the allele for green eyes is dominant over the allele for white eyes, and a heterozygous green-eyed male is mated with a white-eyed female, what is the probability that they will have green-eyed offspring?

If parents with the following genotypes (AABb * aaBb) have offspring, what is the probability that they will have an offspring with the genotype (AaBB) ?

A research geneticist discovered that a particular trait is controlled by ______ she identified as B, b₁, b₂, b₃, b₄, b₅.

Humans have the diploid number of chromosomes, 2n = 46. This also indicates humans

"This patient with Marfan syndrome has really long fingers and toes, and is exceptionally tall." This is a statement describing

"She is a carrier of the cystic fibrosis trait." This statement acknowledges that this person is

When an organism has two different alleles for a given trait, the allele that is expressed, overshadowing the expression of the other allele, is said to be

"Two out of three times, they will pass on the trait." This is a statement of

"We are only going to trace this one trait from one generation to another." This statement would indicate that

When the two alleles C^R C^W are the genotype of an individual, that person displays features of both alleles. This is known as

Geneticists use this term when explaining how genetic information is converted into physical features of a cell or organism.

"She is a carrier of the cystic fibrosis trait." This statement acknowledges that this person

Quiz 10: Patterns of Inheritance

A man who does not suffer from sickle-cell anemia but is a carrier of the sickle-cell trait is married to a woman who is also a carrier for the sickle-cell trait. If they have a child, there is a ____ probability of that child suffering from sickle-cell anemia.

If the parents of a child have the following genotypes [Bb *Bb], what is the probability that they will have a child with the genotype [Bb]?

If an individual has the genotype BbCc, how many different kinds of gametes can that individual produce?

There are three alleles for blood type, IA and IB are both dominant to iO but IA is not dominant to IB. A man has type O blood. A woman has type A blood but her father had type B blood. If this man and this woman have children what are the possible genotypes of the offspring?

If the parents of a child have the following genotypes [Bb * Bb], what is the probability that they will have a child with the genotype [BB]?

If an individual has the genotype BbCC, how many different kinds of gametes can that individual produce?

The gene for color blindness is a recessive allele located on the X chromosome. If a color-blind man and a color-blind woman have one son and three daughters, how many will be color-blind?

If in houseflies the allele for green eyes is dominant over the allele for white eyes, and a heterozygous green-eyed male is mated with a white-eyed female, what is the probability that they will have green-eyed offspring?

If parents with the following genotypes (AABb * aaBb) have offspring, what is the probability that they will have an offspring with the genotype (AaBB) ?

A research geneticist discovered that a particular trait is controlled by ______ she identified as B, b1, b2, b3, b4, b5.

Humans have the diploid number of chromosomes, 2n = 46. This also indicates humans

"This patient with Marfan syndrome has really long fingers and toes, and is exceptionally tall." This is a statement describing

"She is a carrier of the cystic fibrosis trait." This statement acknowledges that this person is

When an organism has two different alleles for a given trait, the allele that is expressed, overshadowing the expression of the other allele, is said to be

"Two out of three times, they will pass on the trait." This is a statement of

"We are only going to trace this one trait from one generation to another." This statement would indicate that

When the two alleles CR CW are the genotype of an individual, that person displays features of both alleles. This is known as

Geneticists use this term when explaining how genetic information is converted into physical features of a cell or organism.

"She is a carrier of the cystic fibrosis trait." This statement acknowledges that this person

A research geneticist discovered that a particular trait is controlled by ______ she identified as B, b₁, b₂, b₃, b₄, b₅.

When the two alleles C^R C^W are the genotype of an individual, that person displays features of both alleles. This is known as