The fruit fly has 8 chromosomes (2n) in each cell. During the interphase of Mitosis if the number of chromosomes at G1 phase is 8, what would be the number of chromosomes after the S phase?
Which stage of meiotic prophase shows terminalisation of chiasmata as its distincitve feature?
The centriole undergoes duplication during:
(2) G2 phase
Match List-I with List-II
|(a) S phase
(b) G2 phase
(c) Quiescent stage
(d) G1 phase
|I. Proteins are synthesized
II. Inactive phase
III. Interval between mitosis and initiation of DNA replication
IV. DNA replication
Choose the correct answer from the options given below.
(a) (b) (c) (d)
1. (iv) (i) (ii) (iii)
2. (ii) (iv) (iii) (i)
3. (iii) (ii) (i) (iv)
4. (iv) (ii) (iii) (i)
Which of the following stages of meiosis involves division of centromere?
(1) Anaphase II
(2) Telophase II
(3) Metaphase I
(4) Metaphase II
Match the following events that occur in their respective phases of cell cycle and select the correct option :
(a) G 1 phase (i) Cell grows and organelle duplication
(b) S phase (ii) DNA replication and chromosome duplication
(c) G 2 phase (iii) Cytoplasmic growth
(d) Metaphase in M-phase (iv) Alignment of chromosomes
1. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
2. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
3. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
4. (a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
During Meiosis 1, in which stage synapsis takes place?
Attachment of spindle fibers to kinetochores of chromosomes becomes evident in :