In mitotic cell division, the division of centromere and the division of chromatid occurs between
anaphase and telophase
prophase and metaphase
telophase and interphase
anaphase and metaphase
Spindle chromosomes have
centriole
kinetochore
chromocentre
chromomere
B.
kinetochore
As prometaphase ends and metaphase begins, the chromosomes align along the cell equator. Every chromosome has at least two microtubules extending from its kinetochore — with at least one microtubule connected to each pole. At this point, the tension within the cell becomes balanced, and the chromosomes no longer move back and forth. In addition, the spindle is now complete, and three groups of spindle microtubules are apparent. Kinetochore microtubules attach the chromosomes to the spindle pole; interpolar microtubules extend from the spindle pole across the equator, almost to the opposite spindle pole; and astral microtubules extend from the spindle pole to the cell membrane.
In mitosis the duplication of chromosomes occurs during
early prophase
late prophase
interphase
late telophase
Bivalents in meiosis are
tetrad
pairs of non-homologous chromosomes
pairs of several chromatids
pairs of homologous chromosomes
In which stage of the first meiotic division, each chromosome undergoes longitudinal division to give rise to two sister chromatids ?
Zygotene
Diplotene
Diakinesis
Pachytene
Which of the following sequence is a correct one for meiotic cell cycle?
G1 S G2 M G1
G1 G2 S M G2
G2 G1 S M G2
S G1 G2 M S
Chromosomes replicate in which stage of meiosis?
Prophase- I
Prophase- II
Telophase- I
Interphase
In which stage of cell division chromosomes are most condensed
Prophase
Metaphase
Anaphase
Telophase
Which phase comes in between the G1 and G2 phases of cell cycle?
M - phase
G0 - phase
S - phase
Interphase
Cell division cannot be stopped in which phase of the cell cycle?
G1- phase
G2- phase
S- phase
Prophase