You might think of how parents look like their children. Their shared characterisitecs are coded
in the DNA passed down by the parent. This DNA is in all cells, which copies itself as one cells
divides into two. Do you think this process is the same for all cells? - Answers No, because
eukaryotic cells would need more complex processes due to their size and complexity
See if you can identify which steps should occur in binary fission below: - Answers - DNA is
copied in place
- Cell wall and membrane pinch closed
- DNA migrates to either side of cell
- Two genetically identical cells are present
Binary fission is used by: - Answers prokaryotes
And produces - Answers Two genetically identical cells
Eukaryotes (plants, animals, and fungi) reproduce differently than prokaryotes on a cellular level.
Which of the following do you think contributes most to this different process? - Answers
Eukaryotes generally have larger genomes
Normally, the cell is in a state called interphase, which has three stages - G1, S, and G2, shown
to the right. In interphase, the cell is performing its normal functions, but toward the end some
changes begin happening. What do you see happening in the images to the right? - Answers The
genetic material is being copied
The first stage of mitosis is called prophase. The images to the right show a cell both before
and after prophase. What appears different? - Answers The genetic material has condensed
Shown on the right is an enlarged version of the diagram of the cell after prophase, in which X-
shaped structures called chromosomes have condensed from chromatin. Do you think
chromosomes would always be shaped like an X? Why or why not? - Answers No - other
organisms might have differently shaped chromosomes
Shown at right is a diagram of a cell in the second phase of mitosis, metaphase. What has
happened in metaphase? Select all that apply: - Answers Chromosomes are lining up in the
middle of the cell
The chromosomes have connected to something on either end of the cell
The nucleus has dissolved
The third phase of mitosis is called anaphase. What do you see happening in anaphase? Select
all that apply. - Answers he chromosomes are moving to either end of the cell