Nucleotide uptake in Mitosis vs meiosis

[ihatebluescrubs]

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While reviewing AAMC 7, BS #144, I was slightly confused with Kaplan's explanation about new nucleotide uptake in meiosis vs mitosis.

question answer

In BS #144, the answer choices forces us to compare the uptake and incorporation of radioactive nucleotide in meiosis vs mitosis. I originally thought that in mitosis, we have 1 pair of mom and dad chromosomes (so total of 2 chromatids), replicates with new nucleotide to make a total of 4 chromatids. In Meiosis, we also have 1 pair of mom and dad chromosomes (total of 2 chromatids) that replicate with new nucleotide to make a total of 4 chromatids. Because of this, I thought that nucleotide and DNA replication/synthesis is exactly the same for both meiosis and mitosis.

Kaplan's explanation (for part A and B) didn't seem to correlate with what I stated above. Did I miss something?

 

[Leonardo Noto]

While reviewing AAMC 7, BS #144, I was slightly confused with Kaplan's explanation about new nucleotide uptake in meiosis vs mitosis.

question answer

In BS #144, the answer choices forces us to compare the uptake and incorporation of radioactive nucleotide in meiosis vs mitosis. I originally thought that in mitosis, we have 1 pair of mom and dad chromosomes (so total of 2 chromatids), replicates with new nucleotide to make a total of 4 chromatids. In Meiosis, we also have 1 pair of mom and dad chromosomes (total of 2 chromatids) that replicate with new nucleotide to make a total of 4 chromatids. Because of this, I thought that nucleotide and DNA replication/synthesis is exactly the same for both meiosis and mitosis.

Kaplan's explanation (for part A and B) didn't seem to correlate with what I stated above. Did I miss something?

Here are some good diagrams from Google Images that ought to help you clear it up.

http://www.google.com/imgres?imgurl...YKwEsPT2QW54oDgBA&sqi=2&ved=0CD0Q9QEwAg&dur=5

Dr. Leonardo Noto
www.leonardonoto.com

 

[Postictal Raiden]

While reviewing AAMC 7, BS #144, I was slightly confused with Kaplan's explanation about new nucleotide uptake in meiosis vs mitosis.

question answer

In BS #144, the answer choices forces us to compare the uptake and incorporation of radioactive nucleotide in meiosis vs mitosis. I originally thought that in mitosis, we have 1 pair of mom and dad chromosomes (so total of 2 chromatids), replicates with new nucleotide to make a total of 4 chromatids. In Meiosis, we also have 1 pair of mom and dad chromosomes (total of 2 chromatids) that replicate with new nucleotide to make a total of 4 chromatids. Because of this, I thought that nucleotide and DNA replication/synthesis is exactly the same for both meiosis and mitosis.

Kaplan's explanation (for part A and B) didn't seem to correlate with what I stated above. Did I miss something?

I think you're over-complicating it. The question stem gives out the answer when it mentions "DEOXYthymidine". This word should have hinted you that the DNA is being labeled. Looking at the graph, you see that this labeled material "DNA" increases in concentration between the indicated time intervals. Neither mitosis or meiosis is responsible for the increase in nucleic acid material in the cell, because the increase in DNA occurs in Interphase. We are now left with C and D. Since we have established that the labeled material is DNA, option D is eliminated.

 

[Temperature101]

While reviewing AAMC 7, BS #144, I was slightly confused with Kaplan's explanation about new nucleotide uptake in meiosis vs mitosis.

question answer

In BS #144, the answer choices forces us to compare the uptake and incorporation of radioactive nucleotide in meiosis vs mitosis. I originally thought that in mitosis, we have 1 pair of mom and dad chromosomes (so total of 2 chromatids), replicates with new nucleotide to make a total of 4 chromatids. In Meiosis, we also have 1 pair of mom and dad chromosomes (total of 2 chromatids) that replicate with new nucleotide to make a total of 4 chromatids. Because of this, I thought that nucleotide and DNA replication/synthesis is exactly the same for both meiosis and mitosis.

Kaplan's explanation (for part A and B) didn't seem to correlate with what I stated above. Did I miss something?

You should label your post as AAMC 7 so that people who has not taken it yet can know not to read it....