Multiple Allelism

Q.

A child’s blood group is ‘O’. The parent’s blood groups cannot be

1. A and A

2. A and B

3. AB and O

4. B and O

Q.

Why do we resemble our family members but are not identical to them except in the case of monozygotic twins?

Q. A child with blood group ‘O’ cannot have either parents of the blood group:

1. B and O
2. A and O
3. AB
4. A and B

Q. Briefly describe the following:
Polymorphism

Q. Assertion :ABO blood group system provides a good example of multiple alleles. Reason: In ABO blood group system, when /A and JB alleles are present together, they both express their own types.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

1. A, B
2. B, D
3. B, C
4. A, D
5. A, C

Q.

The existence of more than two allelic forms of a particular gene is termed as

1. Pleiotropy

2. Multiple allelism

3. Polygenic traits

4. Epistasis

Q. In human blood grouping, the four basic blood types are type A, type B, type AB, and type O. The blood proteins A and B are :

1. sex-linked traits
2. codominant traits
3. simple dominant and recessive traits
4. incomplete dominant traits

Q. Multiple allelism controls inheritance of

1. blood groups
2. PKU
3. sickle cell anemia
4. colour blindness

Q. ABO blood group is based on

1. dominance
2. Incomplete dominance
3. Epistasis
4. Multiple alleles

Q. For a trait such as human blood types that have multiple alleles (there are 3: A, B, and 0), how many alleles can be present in the somatic cells of an individual?

1. One
2. Three
3. Two
4. Four
5. Eight

Q. Multiple allelism controls the inheritance of ___.

1. Phenylketonuria
2. Skin colour
3. Colourblindness
4. Blood group

Q. Which of the following pairs is wrongly matched?

1. XO type sex determimation : Grasshopper
2. ABO blood grouping : Co-dominance
3. Starch synthesis in pea : Multiple alleles
4. T.H. Morgan : Linkage

Q. Multiple allelism controls the inheritance of ___.

1. Colourblindness
2. Blood group
3. Phenylketonuria
4. Skin colour

Q.

Choose the correct answer from the four options given below.

The recessive gene is the one that expresses itself in

1. Heterozygous condition

2. Homozygous condition

3. F₂ generation

4. Y-linked inheritance

Q. The existence of more than two allelic forms of a particular gene is termed as .

1. pleiotropy
2. polygenic traits
3. epistasis
4. multiple allelism

Q. The existence of more than two allelic forms of a particular gene is termed as .

1. pleiotropy
2. polygenic traits
3. epistasis
4. multiple allelism

Q. Blood grouping in humans is controlled by

1. 4 alleles in which I${}^A$ is dominant
2. 3 alleles in which I${}^A$ and I${}^B$ are dominant
3. 2 alleles in which none is dominant
4. 3 alleles in which I${}^A$ is recessive
5. 3 alleles in which I${}^A$ and I${}^B$ are codominant

Q. Multiple allelism controls the inheritance of ___.

1. Colourblindness
2. Blood group
3. Phenylketonuria
4. Skin colour

Q. Genetic map is one that:

1. Establishes site of the genes on chromosomes
2. Establishes the various stages in gene evolution
3. Shows the stages during cell division
4. Shows the distribution of various species in a region

Q. Example of quantitative inheritance is

1. Kinefelter's syndrome
2. Colourblindness
3. Alkaptonuria
4. Colour of skin

Q. ABO blood group system is due to

1. Incomplete dominance
2. Epistasis
3. Multiple allelism
4. Multifactor inheritance

Q. Match the terms in column I with their description in column II and choose the correct option.

Q. Three children in a family have blood types O, AB and B respectively. What are the genotypes of their parents?

1. $I^{A}I$ and $I^{B}I$
2. $I^B{I}^B$ and $I^A{I}^A$
3. $I^A{I}^B$ and $II$
4. $I^A{I}^A$ and $I^{B}I$

Q.

The existence of more than two allelic forms of a particular gene is termed as ___.

1. Pleiotropy

2. Polygenic traits

3. Epistasis

4. Multiple allelism

Q.

The existence of more than two allelic forms of a particular gene is termed as ___.

1. Pleiotropy

2. Polygenic traits

3. Epistasis

4. Multiple allelism

Q. Which of the following pairs is wrongly matched?

1. XO type sex determimation : Grasshopper
2. Starch synthesis in pea : Multiple alleles
3. T.H. Morgan : Linkage
4. ABO blood grouping : Co-dominance

Q. (a) Explain the phenomena of multiple allelism and co-dominance taking ABO blood group as an example.
(b) What is the phenotype of the following:
(i) $I^{A}i$ (ii) $ii$

Q.

Genetic Engineeering is connected with (A) Ephenics (B) Division of Nucleus (C) Ethology (D) All