Cell reproduction: Is it DNA replication that allows two new daughter cells to maintain chromosome pairs?

Question

I am studying a basic physical anthro uni book for the summer to see if I want to add anthro as a minor to my psyc major this fall, and am currently in a section reviewing how biological traits are inherited. I'm a little confused about how chromosomes split and become only one strand during mitosis, and then suddenly after two new daughter cells emerge each has double-strand chromosomes again. The way the book goes about explaining it, it talks about DNA replication first (and then the part RNA plays in protein synthesis), then talks about cell division, discussing mitosis first. From the way I think I'm understanding it, it is the DNA/RNA process that allows the single strands to become double-stranded again after mitosis. Is this correct?

Answer 1

No! The strands are doubled at synthesis, so that both daughter cells have a full complement due to prophase mitosis. Protein synthesis has nothing to do with mitosis. You social scientists?!?!! Go here and learn properly!!!!

Click on the blue and when at the site put mitosis into the " finder ". It will take you there and give you choices. My attitude has nothing to do with your ignorance. Everyone over the age of 12 needs to be familiar with the process of mitosis.

http://www.accessexcellence.org

/RC/VL/GG/mitosis.html

Answer 2

mitosis maybe?

Answer 3

Roughly, but you may wish to look more into Mendel's work. Also, I'd try looking at Wikipedia or others for better references.

Answer 4

I am studying the exact same thing right now and yes it is VERY Confusing at first. Mitosis? Meiosis? DNA replication? Protein Synthesis?  So firstly... Take a deep breath.

Secondly Meiosis occurs when the regular (somatic ) cells make gametes (s*x cells) So that the 46 chromosome in the original cell will create 23 chromosomes in the daughter cells.  The only time that we see the chromosomes in its double state is before cell division once the DNA has replicated itself.

Mitosis occurs when one cell divides and creates two daughter cells that are identical to the original cell, First the DNA replicates (in the nucleaus) which causes the chromosomes to occur in their doubled state. During cell division the chromosomes split and go to opposite poles to form to cells and then there are 46 chromosome in the new cells and the chromosome are now in their natural (single ) state.

DNA replication occurs before cell division and in the nucleaus but protein synthesis occurs in the nucleaus and the ribosomes and occurs all the time. RNA only plays a role in Protein synthesis, it borrow information from the DNA strand to take to the ribosomes to make proteins.

You  deal with DNA during Meiosis and mitosis and protein synthesis. But you only deal with RNA during protein synthesis not the other two,

I hope I am not confusing you further if you need any clarification on anything that I have mentioned or pertaining to this subject, add it to your question.

And forget everyone else, This is the hardest part of Anthro but dont let it put you off cos it will be easier to understand once you take the subject, it WILL make sense. Just have a little patience.

Holla if you need more info and good luck, you're almost there.

You are dealing with a LOT if info right now so I think its best to go through everything step by step as you would in a regular class and maybe we can clarify each step for you. You are expecting too much of yourself too soon.