In an experiment, cells are arrested in metaphase using colchicine, a drug that inhibits microtubule polymerization. If these cells are then fused with cells in G1 phase, what is the most likely outcome for the G1 chromosomes?
The G1 chromosomes will replicate their DNA.
The G1 chromosomes will condense prematurely.
The G1 chromosomes will remain unaffected.
The G1 chromosomes will fragment.
Related Questions
Which of the following statements is INCORRECT regarding mitosis?
Mitosis results in two daughter cells with identical genetic information to the parent cell.
Mitosis is the process by which gametes are produced.
Mitosis is essential for growth and repair in multicellular organisms.
The chromosome number remains the same after mitosis.
Which of the following events is NOT characteristic of mitotic cell division?
Condensation of chromosomes
Replication of DNA
Synapsis and crossing over
Formation of the spindle apparatus
When 16 cells are formed from a single cell, how many times cells divide and how many cells are formed in the 3rdgeneration?
3 divisions, 4 cells in the 3rd generation
4 divisions, 8 cells in the 3rd generation
4 divisions, 16 cells in the 3rd generation
8 divisions, 4 cells in the 3rd generation
If you are provided with root-tips of onion in your class and are asked to count the chromosomes, which of the following stages can you most conveniently look into?
Metaphase
Telophase
Anaphase
Prophase
The coconut water from tender coconut represents:
Endocarp
Fleshy mesocarp
Free nuclear proembryo
Free nuclear endosperm
I. Chromosomes cluster at opposite spindle poles their identity is lost as discrete elements
II. Nuclear envelope assembles around the chromosome clusters
III. Nucleolus, Golgi complex and ER reform
Above features indicates which phase of mitosis
Anaphase
Telophase
Cytokinesis
S-phase
Identify A-C in the given statements, and choose the correct option
I. Spindle microtubules that extend from the two poles of a dividing cell are called …A…
II. A centromere connects two identical copies of a single chromosomes. These two copies are called …B…
III. In ‘X’ phase, the paired chromosomes separate and begin moving to opposite ends of the cell. This ‘X’ is called …C…
A-kinetochore fibres; B-chromatids; C-metaphase
A-polar fibres; B-homologous chromosomes; C-Prophase
A-polar fibres; B-sister chromatids; C-anaphase
A-kinetochore fibres; B-asters; C-anaphase
Which of the protein is found in spindle fibre?
Tubulin
Albumin
Mucin
Haemoglobin
Consider the following statements about plant cytokinesis
I. It usually occurs by cell plate method
II. The spindle usually persists during cytokinesis
III. Cell plate grows centrifugally
Which of the statements given above are correct?
I and II
I and III
II and III
I, II and III
During coconut development, the initial stage of endosperm formation within the tender coconut results in:
A cellular mass called cellular endosperm
A multinucleate liquid called free-nuclear endosperm
A partially cellularized structure called helobial endosperm
A solid, layered structure called ruminate endosperm
