Welcome to the Multiple Alleles MDCAT MCQs with Answers. In this post, we have shared Multiple Alleles Multiple Choice Questions and Answers for PMC MDCAT 2024. Each question in MDCAT Biology offers a chance to enhance your knowledge regarding Multiple Alleles MCQs in this MDCAT Online Test.
Which of the following is an example of a trait controlled by multiple alleles in humans?
a) Blood type
b) Eye color
c) Hair texture
d) Skin color
Multiple alleles refer to:
a) Three or more alleles for a single gene
b) Two alleles for each gene
c) Only dominant alleles
d) Alleles that are always expressed
In ABO blood typing, which allele is recessive?
a) IA
b) IB
c) IO
d) IAIB
The IA and IB alleles for blood type are:
a) Dominant and recessive
b) Recessive
c) Codominant
d) Epistatic
The presence of multiple alleles can result in:
a) Only two phenotypes
b) Multiple phenotypes
c) No phenotypic variation
d) Only recessive traits
Which of the following blood groups can a person with genotype IAIB have?
a) A
b) B
c) AB
d) O
Which of the following is not an example of a trait governed by multiple alleles?
a) ABO blood group
b) Coat color in rabbits
c) Height in humans
d) Eye color in flies
How many alleles can an individual carry for a gene with multiple alleles?
a) One
b) Two
c) Three
d) Four
Which of the following blood groups can a person with genotype IOIO have?
a) A
b) B
c) AB
d) O
Multiple alleles for a gene are typically found:
a) In a population
b) In an individual
c) Only in recessive traits
d) Only in dominant traits
Which combination of alleles would produce blood type O?
a) IAIA
b) IBIB
c) IAIB
d) IOIO
Which allele combination results in blood type B?
a) IAIB
b) IBIB
c) IAIA
d) IOIO
The inheritance of multiple alleles is different from simple Mendelian inheritance because:
a) There are more than two alleles for a single gene
b) It involves multiple genes
c) The alleles do not segregate during meiosis
d) Only dominant alleles are expressed
Which genotype would result in blood type A?
a) IOIO
b) IBIB
c) IAIA
d) IAIB
Which of the following is true for codominant alleles?
a) Both alleles are recessive
b) Both alleles are expressed in the phenotype
c) Only one allele is expressed
d) Neither allele is expressed
In multiple alleles, a single gene can have:
a) Two different alleles
b) Three or more alleles
c) One dominant and one recessive allele
d) Only recessive alleles
Which blood type is known as the universal donor?
a) A
b) B
c) AB
d) O
If a person has IAIB genotype, their blood type will be:
a) A
b) B
c) AB
d) O
Multiple alleles can contribute to:
a) Increased variation in the population
b) The dominance of only one phenotype
c) The uniformity of a population
d) The suppression of genetic traits
Which genotype will result in blood type B?
a) IAIO
b) IBIO
c) IAIA
d) IAIB
Multiple alleles of a gene are most often associated with:
a) A single allele in each individual
b) Several phenotypic variations
c) The suppression of all alleles
d) Two dominant alleles only
Which of the following is an example of codominance in multiple alleles?
a) Blood type A
b) Blood type B
c) Blood type AB
d) Blood type O
The IA allele for blood type in humans codes for the production of:
a) Antigen A
b) Antigen B
c) Antigen O
d) Antigen AB
In multiple alleles, how many alleles are inherited from each parent?
a) One
b) Two
c) Three
d) Four
The multiple allele system of ABO blood groups includes the following alleles:
a) IA, IB, IO
b) IA, IAIB, IO
c) IB, IBIA, IO
d) IA, IO, IAB
Which blood group can a person with the IBIB genotype donate to?
a) A
b) B
c) O
d) AB
Which of the following is an example of an antigen produced by the IA allele?
a) Antigen B
b) Antigen A
c) Antigen O
d) Antigen AB
The ABO blood group system is a classic example of:
a) Complete dominance
b) Codominance and multiple alleles
c) Incomplete dominance
d) Epistasis
In a population, multiple alleles can lead to:
a) Genetic diversity
b) No genetic variation
c) Uniform expression of traits
d) Suppression of mutations
Which genotype will result in blood type A?
a) IAIO
b) IOIO
c) IBIO
d) IAIB
A person with blood type O can receive blood from:
a) Only type A
b) Only type B
c) Any blood type
d) Only type O
Which blood type is known as the universal recipient?
a) O
b) AB
c) A
d) B
Multiple alleles for a gene result in:
a) More genetic variation in the population
b) The expression of one dominant trait
c) Only two possible phenotypes
d) Reduced genetic diversity
Which blood type is produced by the IAIO genotype?
a) O
b) A
c) B
d) AB
Which genotype will result in blood type AB?
a) IAIO
b) IAIA
c) IAIB
d) IOIO
Which of the following genotypes can produce offspring with blood type O?
a) IAIB
b) IAIA
c) IOIO
d) IBIB
If a person inherits two IA alleles, their blood type will be:
a) O
b) A
c) B
d) AB
In the case of multiple alleles, an individual will carry:
a) Only one allele from the population
b) Two alleles for a gene
c) Three alleles for a gene
d) Multiple alleles for different genes
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