Question

Assume that a drug is developed that prevents the prometaphase stage of mitosis from occurring but does not prevent any stages of mitosis prior to prometaphase from occurring nor does it interfere with any part of interphase. What will be the immediate consequence of this drug?

1-DNA replication will not happen so that each chromosome will contain a single DNA molecule. 2- The chromosomes will not be able to condense. 3- Sister chromatids will not be present. 4-Spindle microtubules will not be able to attach to chromatids. 5- Sister chromatids will separate and move toward opposite poles prematurely.

Answer 1

Answer:

4-Spindle microtubules will not be able to attach to chromatids.

Explanation:

1-DNA replication will not happen so that each chromosome will contain a single DNA molecule.----It occurs in interphase

2- The chromosomes will not be able to condense.---It occurs in prophase

3- Sister chromatids will not be present.---It occurs in prophase

4-Spindle microtubules will not be able to attach to chromatids.--Metphase

5- Sister chromatids will separate and move toward opposite poles prematurely.-----It occurs in anaphase

All the phases before prometaphase occur without any affect of the drug. But the drug prevents the events that occurs from the prometaphase to till the end of cell division.