Question

question 4 of 5
for the purposes of this question, assume that a g1 somatic cell nucleus in a female myrmecia pilosula contains 2 picograms of dna. how much dna would be expected in a metaphase i cell of a female?
16 picograms
32 picograms
8 picograms
4 picograms

Explanation:

• In G1 phase, the cell has not yet replicated its DNA.
• In S phase (after G1), DNA replication occurs. So, if G1 has \( n \) amount of DNA, after S phase (before meiosis I), the amount of DNA becomes \( 2n \).
• Metaphase I occurs after S - phase (where DNA replication has taken place). Given that in G1, the DNA content is \( 2 \) picograms. After S - phase (before meiosis I), the DNA content doubles.

Answer:

4 picograms is incorrect. 8 picograms is correct. 16 picograms and 32 picograms are incorrect. So the answer is 8 picograms.