Question 1

A patient with which blood type can receive blood from any donor?
A) type A
B) type B
C) type AB
D) type O

Accepted Answer

Type AB blood is known as the universal recipient because individuals with this blood type can receive red blood cells from any other blood type.

Question 2

What pattern of inheritance occurs in the ABO blood system where there are three distinct alleles in human populations?

Accepted Answer

Multiple allelism

Question 3

How would the pattern of inheritance for Rh factor be best described?
A) incomplete dominance
B) codominance
C) dominant-recessive
D) sex linkage

Accepted Answer

The inheritance of Rh factor follows the dominant-recessive pattern.

Question 4

What term describes phenotypic features that are coded for by several genes, such as eye color in humans?
A) linked
B) polytrophic
C) polygenic
D) codominant

Accepted Answer

Polygenic traits are those controlled by multiple genes, such as eye color, height, and skin color in humans. These traits often display a continuous range of variation, rather than a clear-cut phenotype, and can be influenced by environmental factors as well.

Question 5

What pattern of inheritance results in Type AB blood?
A) polygenic inheritance
B) simple dominance
C) codominance
D) sex-linked recessive inheritance

Accepted Answer

Type AB blood is the result of codominance, where both the A and B alleles are expressed equally on the surface of red blood cells.

Question 6

How is codominance expressed in an organism?
A) Both of the alleles in a heterozygote are expressed phenotypically in an individual.
B) Expression of two different alleles alternates from one generation to the next.
C) A heterozygote expresses an intermediate phenotype.
D) Offspring exhibit several different phenotypic expressions of a single trait.

Accepted Answer

Codominance is expressed when both alleles in a heterozygote are expressed phenotypically in an individual. This means that neither allele is dominant or recessive, and both contribute to the phenotype in a visible way. One example of codominance is the AB blood type, where both the A and B alleles are expressed and there is no visible dominance between them.

Question 7

What blood type would a child with the genotype IAi have?
A) A
B) B
C) AB
D) O

Accepted Answer

The genotype IAi results in blood type A because the IA allele is dominant over the i allele, which is recessive.

Question 8

Which blood type lacks the sugar found on the surface of red blood cells in other blood types?
A) type A
B) type B
C) type AB
D) type O

Accepted Answer

Type O blood lacks the sugar (antigen) found on the surface of red blood cells in other blood types.

Question 9

Which genotype doesn't have the Rh factor on the red blood cells?
A) Rh+ Rh+
B) Rh+ Rh-
C) Rh- Rh+
D) Rh- Rh-

Accepted Answer

Only individuals with the genotype Rh- Rh- do not have the Rh factor on their red blood cells. The alleles for Rh factor are dominant, meaning that if an individual has at least one Rh+ allele (either Rh+ Rh+ or Rh+ Rh-), they will express the Rh factor on their red blood cells. However, individuals with the genotype Rh- Rh- have two recessive alleles for Rh factor, and therefore do not express it on their red blood cells.

Question 10

What pattern of inheritance occurs when a light blue-colored flower results from a cross between a dark blue-colored flower and a white-colored flower?
A) incomplete dominance
B) codominance
C) independent assortment
D) sex linkage

Accepted Answer

Incomplete dominance occurs when traits blend together, resulting in an intermediate phenotype. In this case, the light blue-colored flower is a blend of the dark blue and white-colored flowers, indicating incomplete dominance. Codominance occurs when both alleles are expressed equally in the phenotype, which is not the case in this scenario. Independent assortment refers to the random segregation of alleles during meiosis, while sex linkage refers to the inheritance of genes on sex chromosomes.

Question 11

Which alleles are dominant to each other in blood type inheritance?
A) Alleles IA and i are dominant to the allele IB.
B) Alleles IB and i are dominant to the allele IA.
C) Alleles IA and IB are dominant to the allele i.
D) Alleles IA, IB, and i are codominant.

Accepted Answer

Alleles IA and IB are codominant and dominant to the recessive allele i, meaning they express themselves equally when present together. However, when both IA and IB are present in an individual, they both contribute to the phenotype resulting in AB blood type.

Question 12

What parental blood type would not be able to produce a child with type O blood?
A) A
B) B
C) AB
D) O

Accepted Answer

Both A and B blood types have the potential to pass on an O allele and produce a child with type O blood. However, type AB individuals have both an A and a B allele, but they do not have an O allele, so they cannot pass it on to their offspring. Therefore, parents with the blood types A, B, or O could potentially produce a child with type O blood, but parents with the blood type AB could not.

Question 13

What genetic phenomenon occurs when a dominant allele has different effects between heterozygous individuals and homozygous individuals?
A) codominance
B) continuous variation
C) incomplete dominance
D) polygenic inheritance

Accepted Answer

In incomplete dominance, the phenotype of heterozygous individuals is a blend of the phenotypes of the two homozygous individuals. This occurs when the dominant allele only partially expresses itself, resulting in a phenotype that is intermediate between the two homozygous forms. For example, when a red-flowered plant and a white-flowered plant are crossed and the offspring have pink flowers, this is an example of incomplete dominance.

Question 14

What pattern of inheritance is occurring if one person in a population has two different alleles of a particular gene and other people in the population have a third allele of this gene?
A) codominance
B) pleiotropy
C) incomplete dominance
D) multiple allelism

Accepted Answer

This is an example of multiple allelism, where a particular gene has more than two alleles present in a population.

Question 15

What pattern of inheritance applies to a woman with type A blood who has the alleles IA and i?
A) polygenic inheritance
B) simple dominance
C) codominance
D) sex-linked recessive inheritance

Accepted Answer

The inheritance of ABO blood types, including type A with alleles IA and i, is an example of simple dominance where IA (A allele) is dominant over i (O allele).

Question 16

What pattern of inheritance includes the AB blood type, in which both A and B alleles are expressed?
A) incomplete dominance
B) codominance
C) independent assortment
D) sex linkage

Accepted Answer

Codominance is the pattern of inheritance where both alleles are equally expressed in the phenotype. In the case of blood types, the AB blood type is an example of codominance because both A and B alleles are expressed equally on the surface of the red blood cells. This is in contrast to incomplete dominance, where the heterozygous phenotype is a blend of the two alleles, and independent assortment and sex linkage, which refer to patterns of inheritance based on the location of genes on chromosomes.

Question 17

What blood type would a person who is homozygous recessive for all blood type alleles have?
A) A
B) B
C) AB
D) O

Accepted Answer

A person who is homozygous recessive for all blood type alleles (i.e. aa bb cc dd) can only produce the O blood type. This is because the O allele is recessive to both the A and B alleles, and the AB blood type requires both A and B alleles.

Question 18

In human ABO blood types, what description applies to the alleles for A and B because they're both expressed?

Accepted Answer

The answer of In human ABO blood types, what description...

Question 19

What pattern of inheritance results when the phenotype of a heterozygote is intermediate between both homozygotes?
A) incomplete dominance
B) codominance
C) independent assortment
D) sex linkage

Accepted Answer

In incomplete dominance, the heterozygote displays a phenotype that is intermediate between the two homozygotes. This means that neither allele is completely dominant over the other, resulting in a blend of traits. For example, in a cross between a red-flowered plant and a white-flowered plant, the F1 generation may have pink flowers, which is an intermediate phenotype between the two homozygotes.

Question 20

How will people with the same blood type be related?
A) They are always unrelated.
B) They are always related.
C) They may or may not be related.
D) They always have both alleles in common but are not necessarily related.

Accepted Answer

Blood type is inherited from parents, but people with the same blood type may still be unrelated if they have different sets of ancestors. Therefore, they may or may not be related.

Quiz 8: DNA Detective: Complex Patterns of Inheritance and Dna Profiling

A patient with which blood type can receive blood from any donor?

What pattern of inheritance occurs in the ABO blood system where there are three distinct alleles in human populations?

How would the pattern of inheritance for Rh factor be best described?

What term describes phenotypic features that are coded for by several genes, such as eye color in humans?

What pattern of inheritance results in Type AB blood?

How is codominance expressed in an organism?

What blood type would a child with the genotype IAi have?

Which blood type lacks the sugar found on the surface of red blood cells in other blood types?

Which genotype doesn't have the Rh factor on the red blood cells?

What pattern of inheritance occurs when a light blue-colored flower results from a cross between a dark blue-colored flower and a white-colored flower?

Which alleles are dominant to each other in blood type inheritance?

What parental blood type would not be able to produce a child with type O blood?

What genetic phenomenon occurs when a dominant allele has different effects between heterozygous individuals and homozygous individuals?

What pattern of inheritance is occurring if one person in a population has two different alleles of a particular gene and other people in the population have a third allele of this gene?

What pattern of inheritance applies to a woman with type A blood who has the alleles IA and i?

What pattern of inheritance includes the AB blood type, in which both A and B alleles are expressed?

What blood type would a person who is homozygous recessive for all blood type alleles have?

In human ABO blood types, what description applies to the alleles for A and B because they're both expressed?

What pattern of inheritance results when the phenotype of a heterozygote is intermediate between both homozygotes?

How will people with the same blood type be related?