Welcome to the Inheritance Of Two Traits MDCAT MCQs with Answers. In this post, we have shared Inheritance Of Two Traits Multiple Choice Questions and Answers for PMC MDCAT 2024. Each question in MDCAT Biology offers a chance to enhance your knowledge regarding Inheritance Of Two Traits MCQs in this MDCAT Online Test.
In a dihybrid cross, the two traits studied are located on:
a) Same chromosome
b) Different chromosomes
c) Same gene
d) Same locus
The phenotypic ratio for a dihybrid cross is typically:
a) 1:2:1
b) 3:1
c) 9:3:3:1
d) 1:1:1:1
Which of the following genotypes would result from a dihybrid cross of two heterozygous individuals (AaBb)?
a) AaBb
b) AABB
c) aabb
d) All of the above
Which of the following refers to the inheritance of two traits simultaneously?
a) Monohybrid cross
b) Dihybrid cross
c) Backcross
d) Test cross
Mendel’s second law, the law of independent assortment, applies to:
a) A single trait
b) Two or more traits
c) Dominant traits only
d) Recessive traits only
In a dihybrid cross, how many different gametes are produced by a heterozygous individual (AaBb)?
a) 2
b) 4
c) 6
d) 8
The combination of two traits in a dihybrid cross is represented by which of the following genotypes?
a) Aa
b) Bb
c) AaBb
d) AABb
In a dihybrid cross, the genotype ratio for heterozygous offspring is:
a) 9:3:3:1
b) 1:2:1
c) 4:4
d) 1:1
If an organism with genotype AaBb is crossed with an organism with genotype aabb, the phenotypic ratio will be:
a) 9:3:3:1
b) 1:1:1:1
c) 2:2
d) 3:1
Which of the following best represents a heterozygous individual for two traits?
a) AABB
b) AaBb
c) aaBB
d) aabb
In a dihybrid cross, what percentage of the F2 generation are expected to show both dominant traits?
a) 25%
b) 50%
c) 75%
d) 56.25%
The parental cross between AABB and aabb produces F1 offspring with which genotype?
a) AaBb
b) AABB
c) aabb
d) AaBB
A dihybrid cross between two heterozygous organisms (AaBb) results in what phenotypic ratio?
a) 1:2:1
b) 9:3:3:1
c) 3:1
d) 1:1:1:1
Mendel’s law of independent assortment applies when:
a) Two genes are on the same chromosome
b) Two genes are on different chromosomes
c) Only one gene is involved
d) There is no crossing over
In a dihybrid cross, which of the following combinations would result in a double recessive phenotype?
a) AABB
b) AaBb
c) aabb
d) AaBB
The genotypic ratio for the F2 generation in a dihybrid cross is:
a) 9:3:3:1
b) 1:1:1:1
c) 1:2:1
d) 16:0
In a dihybrid cross, a ratio of 9:3:3:1 in the F2 generation demonstrates:
a) Complete dominance
b) Independent assortment
c) Incomplete dominance
d) Co-dominance
A cross between AaBb and AaBb produces how many possible phenotypes?
a) 2
b) 3
c) 4
d) 1
What is the probability of getting offspring with both recessive traits in a dihybrid cross of heterozygous parents (AaBb x AaBb)?
a) 1/4
b) 1/16
c) 3/16
d) 9/16
Which of the following represents a test cross for two traits?
a) AaBb x AABb
b) AaBb x aabb
c) Aa x BB
d) AABb x aabb
If an individual heterozygous for two traits is crossed with a homozygous recessive individual for both traits, what phenotypic ratio is expected?
a) 1:1:1:1
b) 3:1
c) 9:3:3:1
d) 4:4
In a dihybrid cross, what proportion of offspring would show the recessive phenotype for one trait and the dominant phenotype for the other trait?
a) 3/16
b) 9/16
c) 1/16
d) 1/4
Which of the following combinations is not possible from a dihybrid cross of AaBb x AaBb?
a) AaBb
b) AABB
c) aabb
d) AAbb
In a dihybrid cross, how many different phenotypes are possible?
a) 1
b) 2
c) 4
d) 8
Which of the following represents a double dominant phenotype in a dihybrid cross?
a) AaBB
b) aabb
c) AABB
d) AaBb
Which of the following can result from the cross AaBb x AaBb?
a) AaBb
b) AABb
c) aabb
d) All of the above
In a dihybrid cross, the probability of an offspring with the genotype AaBb is:
a) 1/16
b) 2/16
c) 4/16
d) 9/16
If a dihybrid organism is crossed with a homozygous recessive organism, what proportion of offspring will show both dominant traits?
a) 25%
b) 50%
c) 75%
d) 100%
The independent inheritance of two traits is observed when genes are located on:
a) Same chromosome
b) Different chromosomes
c) Same locus
d) Different alleles
Which of the following would produce only heterozygous offspring in a dihybrid cross?
a) AaBb x AAbb
b) AABB x aabb
c) AaBB x aaBb
d) aaBb x AABB
In a dihybrid cross, two heterozygous individuals will produce how many genotypes?
a) 3
b) 9
c) 16
d) 4
Which of the following is the expected phenotypic ratio when crossing two dihybrid individuals (AaBb x AaBb)?
a) 3:1
b) 9:3:3:1
c) 1:1
d) 2:1
What is the probability of obtaining offspring with the genotype Aabb from a dihybrid cross (AaBb x AaBb)?
a) 1/4
b) 1/16
c) 1/8
d) 3/16
How many different types of gametes can be produced by an individual with the genotype AaBb?
a) 2
b) 3
c) 4
d) 8
Which of the following is a possible result from a cross between AaBb and aabb?
a) AaBb
b) Aabb
c) aaBb
d) All of the above
In a dihybrid cross, the number of offspring showing both dominant traits is expected to be:
a) 9/16
b) 1/16
c) 3/16
d) 4/16
Which of the following genotypes represents an individual homozygous for both traits?
a) AaBb
b) AAbb
c) aabb
d) AABB
In a dihybrid cross, the F1 generation will have which genotype when two homozygous individuals are crossed?
a) AaBb
b) AABb
c) aaBB
d) aabb
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