Aamc 5 bs 110

[justhanging]

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In the beginning of the passage they mention that the macronucleus has 45 ploid number, just to clarify, does this mean that their are 45 unique chromosomes? So humans have 23 unique chromosomes and 23 pairs of homologues chromosomes. In other words is n = 45?

The passage states that the macronucleus receives "an uneven (but approximately equal) amount of DNA from the amitotic macronucleus" (At the bottom of passage shown in the link).

If it receives an equal amount of DNA then how is the answer D for question 110. Where does the variable allele distribution come from? Can someone clarify..

 

[aln012]

The key word is "approximately" equal, which means that it's not exactly equal distribution. Therefore, with repeated binary fissions, eventually there will be a noticeable difference in allele distribution.

 

[justhanging]

I feel like there is much more to this question than just the word "approximately".

 

[justhanging]

The passage states:

Each daughter cell receives an exact copy of the micronuclear DNA and an uneven (but approximately equal) amount of DNA from the amitotic macronucleus.

It seems to me that both daughter cells get the same DNA material (both get the same number of chromosomes) but its uneven because they don't get the same ones. In other words one daughter cell may get 2 copies of chromosome one and none of chromosome two while the other cell might get 2 copies of chromosome two and none of one, so they have the same amount of genetic material but it is uneven. Since chromosome one and two are homolgous (Organism is 45n) it still has the necessary genes to live.

Is this correct?