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Question: A line of mouse cells is growing for many generations in a medium with 15N. cells in G1 are then switched to a new medium that contains 14N. Draw a pair of homologous chromosomes from these cells at the following stages, showing the two strands of DNA molecules found in the chromosomes. Use different colors to represent strands with 14N and 15N.
a. Cells in G1 before switching to medium with 14N
b. Cells in G2 after switching to medium with 14N
c. Cells in anaphase of mitosis after switching to medium with 14N
d. Cells in metaphase I of meiosis after switching to medium with 14N

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Category:- Biology
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