MCQ on Meiosis with Answers Pdf:
1. During meiosis, (sister) chromatid separation occurs at_______
A. meiotic interphase
B. When a tetrad is formed
C. The first division of meiosis
D. meiotic second division
Answer: D
2. Compared with mitosis, what is unique to meiosis is_________
A. Replication of DNA molecules
B. Splitting of centromeres
C. Chromatin forms chromosomes
D. tetrad formation
Answer: D
3. When you observe cells with a microscope, you find that there are 8 chromosomes of different shapes and sizes in a cell, and they are arranged on the equatorial plate. Do you think this cell is in the______
A. Metaphase
B. Metaphase of the second meiotic division
C. Metaphase of the first meiotic division
D. anaphase of mitosis
Answer: B
4. The following are the changes in chromosome behavior during meiosis. The correct order of changes is________
① tetrad
② synapsis
③ chromosome duplication
④ chromatid separation
⑤ homologous chromosome separation
A. ①→②→③→④→⑤
b. ②→③→④→①→⑤
C. ③→①→②→⑤→④
D. ③→②→①→⑤→④
Answer: D
5. Which of the following is not a characteristic of homologous chromosomes________
A. One from the father and one from the mother
B. Shared a centromere during the tetrad period
C. The shape and size are generally the same
D. None of these
Answer: B
6. Which of the following statements about the process of meiosis is correct_______
A. Homologous chromosome association occurs before chromosome duplication
B. In the tetrad stage, the number of chromosomes is equal to the number of DNA molecules
C. Crossovers between non-sister chromosomal haploids of homologous chromosomes occur during the tetrad stage
D. Chromatids are not present at synapsia, while chromatids are present during tetrads
Answer: C
7. During meiosis, which statement about chromosome duplication is true________
A. Each chromosome forms two sister chromatids, connected by the same centromere (dot)
B. Each chromosome forms two sister chromatids, connected by two centromeres (dots)
C. Each chromosome forms two homologous chromosomes, connected by the same centromere (dot)
D. Duplication results in doubling the number of chromosomes
Answer: A
8. A cell in the human body is undergoing meiosis, and there are 44 euchromatic and 2 X chromosomes, then this cell may be______
A. Primary spermatocytes or secondary spermatocytes
B. Primary spermatocytes or primary oocytes
C. Secondary spermatocytes or primary oocytes
D. Secondary spermatocytes or egg cells
Answer: C
9. The options that appear only during meiosis and not during mitosis are______
A. Interphase DNA replication and associated protein synthesis
B. Sister chromatids separate into two daughter cells
C. Post-synaptic non-sister chromatids undergo partial DNA exchange
D. homologous chromosomes
Answer: C
10. During meiosis, the number of chromosomes is halved___________
A. When spermatogonia grow and increase
B. When sperm cells become sperm
C. At the end of the second division
D. At the end of the first split
Answer: D