Telophase II

Q.

Why is Meiosis II termed as Equational Division ?

1. Chromosome number at the end of meiosis II, remains the same as meiosis I, in daughter cells

2. Chromosome number at the end of meiosis II, remains the same as mitosis, in daughter cells

3. The number of chromosomes become halve during meiosis II

4. The chromosomes align equatorially before separation

Q. Arrange the following events that happen during meiosis in the correct order of occurrence:

1. Formation of a dyad of cells
2. Separation of sister chromatids and migration towards the opposite poles
3. Separation of homologous chromosomes and migration towards the opposite poles
4. Formation of four haploid cells

1. I; II; III; IV
2. I; III; II; IV
3. III; I; II; IV
4. II; I; III; IV

Q.

Explain all the benefits of mitosis.

Q. In a parent cell with 2n number of chromosomes, at the end of telophase I ___(i)___ are formed and at the end of telophase II ___(ii)___ are formed.

1. (i) two diploid cells; (ii) four haploid cells
2. (i) four diploid cells; (ii) four haploid cells
3. (i) a dyad of cells; (ii) four haploid cells
4. (i) four haploid cells; (ii) a dyad of cells

Q.

Given below is the group of five terms arrange and rewrite the terms in the correct order, so as to be in a logical sequence:

Metaphase, telophase, prophase, anaphase, cytokinesis.

Q. Which of the following is not a characteristic of meiosis

1. Sister chromatids separation during anaphase II
2. It involves two steps of DNA replication one before meiosis I and another before meiosis II
3. It involves recombination and crossing over
4. Nuclear membrane disappears during prophase

Q. In the image given below, fill in the blanks with the ploidy number of the cells at the respective stage of meiosis.

1. (i) - 2n; (ii) - 2n; (iii) - n
2. (i) - 2n; (ii) - n; (iii) - n
3. (i) - 2n; (ii) - 2n; (iii) - n
4. (i) - n; (ii) - 2n; (iii) - n

Q. Lampbrush chromosomes are observed in

1. Meiotic prophase
2. Meiotic metaphase
3. Mitotic metaphase
4. Mitotic prophase

Q. Giant chromosomes are found in

1. Salivary glands of man
2. Salivary glands of woman
3. Salivary glands of all animals
4. Salivary glands of Drosophila

Q. The cytoplasm divides through cytokinesis and four haploid cells are formed

1. Prophase II
2. Prophase I
3. Anaphase II
4. Telophase II

Q.

Through which type of division does the inheritance of chromosomes occur?

Q. If the somatic cell has 56 chromosomes, select the correct number of chromosome in gametes.

1. 14
2. 28
3. 56
4. 112

Q.

Three copies of chromosome – 21 in a child with down’s syndrome have been analysed using molecular biology technology to detect any possible DNA polymorphism with reference to different alleles located on chromosome – 21. Results showed that out of 3 copies 2 of the chromosomes of the child contain the same alleles as one of the mother’s alleles. Based on this, when did the non – disjunction event most likely occur?

1. Maternal meiosis – I

2. Maternal meiosis –II

3. Paternal meiosis – I

4. Paternal meiosis – II

Q. One chromosome contain two DNA molecule during
A) G1 sub phase
B) metaphase
C) anaphase
D) Telophase
E) prophase

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

Q. Lampbrush chromosomes found in oocytes occur in

1. Leptotene
2. Zygotene
3. Pachytene
4. Diplotene

Q. Consider a diploid cell that has a total of 16 chromosomes. At the end of meiosis I the cell will contain an ‘X’ number of chromosomes and a ‘Y’ number of sister chromatids. What are ‘X’ and ‘Y’?

1. X = 16; Y = 8
2. X = 16; Y = 16
3. X = 8; Y = 16
4. X = 8; Y = 8

Q. The cytoplasm divides through cytokinesis and four haploid cells are formed

1. Prophase I
2. Prophase II
3. Anaphase II
4. Telophase II

Q. The following figure depicts which stage of meiosis?

1. Telophase I
2. Metaphase II
3. Telophase II
4. Prophase II

Q.

Why is Meiosis II termed as Equational Division ?

1. The number of chromosomes become halve during meiosis II

2. The chromosomes align equatorially before separation

3. Chromosome number at the end of meiosis II, remains the same as meiosis I, in daughter cells

4. Chromosome number at the end of meiosis II, remains the same as mitosis, in daughter cells

Q. Arrange the following events that happen during meiosis in the correct order of occurrence:

1. Formation of a dyad of cells
2. Separation of sister chromatids and migration towards the opposite poles
3. Separation of homologous chromosomes and migration towards the opposite poles
4. Formation of four haploid cells

1. I; III; II; IV
2. III; I; II; IV
3. I; II; III; IV
4. II; I; III; IV

Q.

Question 43
An organism has two pair of chromosomes (i.e., chromosome number = 4). Diagrammatically represent the chromosomal arrangement during different phases of meiosis-II. Ans. Daughter cell 1 Chromatids Daughter cell 2 — Centriole Prophase-II Spindle fibre Metaphase-II Stages of meiosis II Anaphase-II Telophase-II

Q. The following figure depicts which stage of meiosis?

1. Telophase I
2. Metaphase II
3. Telophase II
4. Prophase II

Q. Which of the following statements is NOT correct about meiosis?

1. 
   Meiosis involves one duplication of chromosomes.
2. 
   Meiosis requires two divisions.
3. The four daughter cells have one of each pair of chromosome.
4. 
   The four daughter cells have the same number of chromosomes as the parent cell.