Explore topic-wise MCQs in Biology.

This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.

1.

For a poly hybrid cross concerning N traits, what is the number of types of gametes produced by the F1 generation?

A. 2<sup>N</sup>
B. N<sup>2</sup>
C. 2<sup>(2N)</sup>
D. (2N)<sup>2</sup>
Answer» B. N<sup>2</sup>
Discussion
2.

For a poly hybrid cross concerning N trait, what is the number of squares required in the Punnett square to check for the F2 generation?

A. 2<sup>N</sup>
B. N<sup>2</sup>
C. 2<sup>(2N)</sup>
D. (2N)<sup>2</sup>
Answer» D. (2N)<sup>2</sup>
Discussion
3.

For a dihybrid cross, the number of squares is 16 in a Punnett square of F2 generation.

A. True
B. False
Answer» B. False
Discussion
4.

Which of the following are the correct gametes produced by TtYy?

A. Tt, Yy, TY, ty
B. TY, ty, Tt, Yt
C. Yt, yt, YT, yT
D. YT, yt, yY, tT
Answer» D. YT, yt, yY, tT
Discussion
5.

The law of independent assortment states that a dihybrid heterozygote would produce four types of gametes.

A. True
B. False
Answer» B. False
Discussion
6.

If x is the phenotypic ratio of monohybrid cross for trait A and y is the phenotypic ratio of monohybrid cross for trait B, what would be the phenotypic ratio of a dihybrid cross involving traits A and B?

A. xy
B. x + y
C. x<sup>2</sup> + y<sup>2</sup>
D. (xy)<sup>2</sup>
Answer» B. x + y
Discussion
7.

Which of the following is a correct interpretation of the law of independent assortment?

A. Factors exist in pairs
B. Factors segregate such that each gamete gets a single copy
C. For multiple traits under consideration, each segregate independently of one another
D. For multiple traits under consideration, they segregate in a specific pattern
Answer» D. For multiple traits under consideration, they segregate in a specific pattern
Discussion
8.

What law talks about the segregation of two or more traits independent of one another?

A. Law of Dominance
B. Law of Recessiveness
C. Law of Segregation
D. Law of Independent Assortment
Answer» E.
Discussion
9.

Which law was proposed by Mendel based on his dihybrid cross studies?

A. Law of Dominance
B. Law of Recessiveness
C. Law of Segregation
D. Law of Independent Assortment
Answer» E.
Discussion
10.

In Mendel s experiments on garden pea plants, he performed a dihybrid cross of round yellow and green wrinkled seed plants. In the F2 generation, he sampled 1600 plants. Which of the following represents the correct number of plants of each phenotype?

A. 900 round yellow, 300 round green, 300 wrinkled yellow and 100 wrinkled green
B. 900 round green, 300 round yellow, 300 wrinkled yellow and 100 wrinkled green
C. 900 wrinkled green, 300 round yellow, 300 wrinkled yellow and 100 round green
D. 900 round green, 300 wrinkled green, 300 wrinkled yellow and 100 round yellow
Answer» B. 900 round green, 300 round yellow, 300 wrinkled yellow and 100 wrinkled green
Discussion
11.

What is the phenotypic ratio of F2 generation in a dihybrid cross?

A. 3:1
B. 1:2:1
C. 9:3:1
D. 9:3:3:1
Answer» E.
Discussion