Question 1

In the genotype Aabb,

Accepted Answer

A is a dominant allele because in a genotype represented with uppercase and lowercase letters, the uppercase letter (A) signifies a dominant allele, while the lowercase (a) indicates a recessive allele.

Question 2

A gene that can be masked by another gene is called

Accepted Answer

A gene that can be masked by another gene is referred to as recessive. Dominant genes are those that mask the effect of recessive genes.

Question 3

A locus is

Accepted Answer

A locus is specifically the location on a chromosome where a particular gene or genetic marker is situated. It is not the gene itself, an allele, or a concept related to multiple alleles affecting a characteristic.

Question 4

A condition in which a diploid organism has different allelic forms of a particular gene is the definition of

Accepted Answer

Heterozygous refers to a condition where a diploid organism has two different alleles of a particular gene, one inherited from each parent.

Question 5

A heterozygous condition would be characterized by the possession of alleles for

Accepted Answer

A heterozygous condition involves having two different alleles for a single trait, which in this context means having one allele for brown hair and another for red hair.

Question 6

A homozygous recessive condition is

Accepted Answer

A homozygous recessive condition is represented by two identical lowercase letters, such as "aa," indicating that the individual has two copies of the recessive allele for a particular gene.

Question 7

The expression of a gene is called

Accepted Answer

The expression of a gene in the form of observable characteristics or traits in an organism is referred to as the phenotype. This includes physical appearance, development, and behavior.

Question 8

A homozygous condition would be the possession of alleles for

Accepted Answer

A homozygous condition occurs when an individual has two identical alleles for a particular trait, such as red hair and red hair.

Question 9

If I^A and I^B dominate i, which phenotype indicates the genotype when the alleles I^A and i are present?

Accepted Answer

The genotype I^A represents the A allele for blood type, which is dominant over the i allele. Therefore, when present with the i allele, the phenotype will be type A blood.

Question 10

A male has a genotype RrTt. What is the probability of his producing Rt sperm cells?

Accepted Answer

The genotype RrTt can produce four types of gametes: RT, Rt, rT, and rt, each with an equal probability of 25%. Therefore, the probability of producing Rt sperm cells is 25%.

Question 11

When two dice are thrown, both dice will show the number three

Accepted Answer

When two dice are thrown, the total number of possible outcomes is 6 (for the first die) multiplied by 6 (for the second die), which equals 36. The event that both dice show the number three is just one specific outcome among these, so the probability is 1 in 36.

Question 12

The chances of guessing the right answer to this question are

Accepted Answer

The answer of The chances of guessing the right answer...

Question 13

In a fifty-two card deck, the chances of drawing the only ace of spades are

Accepted Answer

There is only one ace of spades in a standard fifty-two card deck, making the probability of drawing it 1 out of 52.

Question 14

In pea plants, smooth seeds (S) are dominant over wrinkled seeds (S). A cross is made between a wrinkled-seed variety and a heterozygous smooth-seed variety. The chance of getting offspring homozygous for smooth seeds is

Accepted Answer

The wrinkled-seed variety must be homozygous recessive (ss) since wrinkled seeds are a recessive trait. The heterozygous smooth-seed variety has the genotype Ss. When these are crossed (Ss x ss), all offspring will have one S allele from the smooth-seed parent and one s allele from the wrinkled-seed parent, resulting in genotypes of Ss. Therefore, it is impossible to get offspring homozygous for smooth seeds (SS) from this cross.

Question 15

In fruit flies normal wings are dominant over vestigial wings. If a homozygous normal-winged fly and vestigial-winged fly were crossed, what would the phenotype of the fly offspring be?

Accepted Answer

Since normal wings are dominant and the cross involves a homozygous normal-winged fly, all offspring will display the dominant phenotype, which is normal wings.

Question 16

In humans, normal vision dominates color-deficiency, and both are X-linked. (The genes are located on the X chromosome.) A color-deficient male marries a woman who is heterozygous for normal vision. If they have a boy, the chance that he will be color-deficient is

Accepted Answer

Since the gene for color vision is X-linked, a male child inherits his X chromosome from his mother and his Y chromosome from his father. The mother is heterozygous, meaning she has one allele for normal vision and one for color deficiency. Therefore, there is a 50% chance she will pass on the allele for color deficiency to a male child, making the probability that he will be color-deficient 50%.

Question 17

In humans, the genes for blood type A and B show lack of dominance to one another and both dominate O. Two type O people would be able to have

Accepted Answer

Since both parents have type O blood, they can only pass on O alleles to their children. Therefore, their children can only have OO genotype, which results in type O blood.

Question 18

In humans, normal skin dominates albino skin; a cross between two albino people results in

Accepted Answer

Albinism is caused by a recessive allele. When two albino individuals (both of whom must be homozygous recessive for the trait) mate, all of their offspring will inherit two recessive alleles, resulting in albinism in all offspring.

Question 19

The probability of parents with the genotypes (Mm) * (Mm) having an offspring with the genotype (mm) is

Accepted Answer

The parents both have the genotype Mm, meaning each can contribute either an M or an m allele to their offspring. For an offspring to have the genotype mm, both parents must contribute the m allele. The probability of one parent contributing an m allele is 1/2, and the same for the other parent. Therefore, the probability of both contributing an m allele is 1/2 * 1/2 = 1/4.

Question 20

The probability of parents with the genotypes (Ll) (ll) having an offspring with the genotype (ll) is

Accepted Answer

The parents' genotypes are Ll (heterozygous) and ll (homozygous recessive). When crossed, the possible genotypes for the offspring are Ll and ll, each with a probability of 1/2. Therefore, the probability of an offspring with the genotype ll is 1/2.

Quiz 10: Patterns of Inheritance

In the genotype Aabb,

A gene that can be masked by another gene is called

A locus is

A condition in which a diploid organism has different allelic forms of a particular gene is the definition of

A heterozygous condition would be characterized by the possession of alleles for

A homozygous recessive condition is

The expression of a gene is called

A homozygous condition would be the possession of alleles for

If I^A and I^B dominate i, which phenotype indicates the genotype when the alleles I^A and i are present?

A male has a genotype RrTt. What is the probability of his producing Rt sperm cells?

When two dice are thrown, both dice will show the number three

The chances of guessing the right answer to this question are

In a fifty-two card deck, the chances of drawing the only ace of spades are

In pea plants, smooth seeds (S) are dominant over wrinkled seeds (S) . A cross is made between a wrinkled-seed variety and a heterozygous smooth-seed variety. The chance of getting offspring homozygous for smooth seeds is

In fruit flies normal wings are dominant over vestigial wings. If a homozygous normal-winged fly and vestigial-winged fly were crossed, what would the phenotype of the fly offspring be?

In humans, normal vision dominates color-deficiency, and both are X-linked. (The genes are located on the X chromosome.) A color-deficient male marries a woman who is heterozygous for normal vision. If they have a boy, the chance that he will be color-deficient is

In humans, the genes for blood type A and B show lack of dominance to one another and both dominate O. Two type O people would be able to have

In humans, normal skin dominates albino skin; a cross between two albino people results in

The probability of parents with the genotypes (Mm) * (Mm) having an offspring with the genotype (mm) is

The probability of parents with the genotypes (Ll) (ll) having an offspring with the genotype (ll) is

Quiz 10: Patterns of Inheritance

In the genotype Aabb,

A gene that can be masked by another gene is called

A locus is

A condition in which a diploid organism has different allelic forms of a particular gene is the definition of

A heterozygous condition would be characterized by the possession of alleles for

A homozygous recessive condition is

The expression of a gene is called

A homozygous condition would be the possession of alleles for

If IA and IB dominate i, which phenotype indicates the genotype when the alleles IA and i are present?

A male has a genotype RrTt. What is the probability of his producing Rt sperm cells?

When two dice are thrown, both dice will show the number three

The chances of guessing the right answer to this question are

In a fifty-two card deck, the chances of drawing the only ace of spades are

In pea plants, smooth seeds (S) are dominant over wrinkled seeds (S) . A cross is made between a wrinkled-seed variety and a heterozygous smooth-seed variety. The chance of getting offspring homozygous for smooth seeds is

In fruit flies normal wings are dominant over vestigial wings. If a homozygous normal-winged fly and vestigial-winged fly were crossed, what would the phenotype of the fly offspring be?

In humans, normal vision dominates color-deficiency, and both are X-linked. (The genes are located on the X chromosome.) A color-deficient male marries a woman who is heterozygous for normal vision. If they have a boy, the chance that he will be color-deficient is

In humans, the genes for blood type A and B show lack of dominance to one another and both dominate O. Two type O people would be able to have

In humans, normal skin dominates albino skin; a cross between two albino people results in

The probability of parents with the genotypes (Mm) * (Mm) having an offspring with the genotype (mm) is

The probability of parents with the genotypes (Ll) (ll) having an offspring with the genotype (ll) is

If I^A and I^B dominate i, which phenotype indicates the genotype when the alleles I^A and i are present?