AP BIOLOGY

THE CELL

CELL COMMUNICATION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

If there are 20 centromeres in a cell at anaphase, how many chromosomes are there in each daughter cell following cytokinesis?

A	10
B	20
C	30
D	40

Explanation:

Detailed explanation-1: -as a result, they will have 10 chromosomes immediately after cytokinesis, each of which is made up of a single chromatid.

Detailed explanation-2: -During anaphase, the sister chromatids are pulled towards the opposite poles by mitotic spindle fibres. At each pole there will be 10 chromosomes i.e, 20 in the total cell.

Detailed explanation-3: -The microtubules of the mitotic spindles are attached to it. Therefore, a cell having 20 centromeres will have 20 chromosomes.

Detailed explanation-4: -Now that there are 20 chromatids, they should be in identical pairs of two (sister chromatids) because replication has occurred. So, there would be 10 centromeres.

Detailed explanation-5: -At the conclusion of anaphase, each end of the cell has an identical and complete set of 46 chromosomes or 23 pairs of homologous chromosomes; they are still diploid. Telophase: Telephase begins once the chromosomes have completed separating and reached the opposite poles of the cell.

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