The part of meiosis that is similar to mitosis is ________.

This lesson is best done after students have at least read about mitosis and meiosis, and/or seen a film, video, or online animation showing these two processes. Mitosis may have been studied earlier in the context of cell studies, or simple cell reproduction. But after an introduction to meiosis, where they've had a chance to get the essential ideas, along with distinctions from mitosis, and the significance of meiosis, have them do this lab. Most students discover that their understanding of critical aspects of meiosis are often not as clear as they should be. This lab will show them the way!

Mitosis and Meiosis - Awesome Science Teacher …

NOVA has a good interactive side-by-side comparison of mitosis and meiosis on this page:

NOVA - How Cells Divide (Mitosis VS Meiosis) - PBS

In meiosis, replicated homologous chromosomes pair off during the first division, then these separate from each other, assuring that one member of each pair of chromosomes goes into two separate cells. Replicates separate in the second division. In mitosis, there is no pairing of replicated homologous chromosomes.

LabBench Activity Mitosis and Meiosis

Later in my Repro unit, as part of my intro to sexual reproduction, I introduced Meiosis as primarily a means of preventing the redoubling of chromosomes (following fertilization) for every generation. In addition, meiosis provides ways for increased variation (random assortment, crossing over, and fertilization--from different lines of ancestry: male and female). After introducing meiosis, I developed a lab experience in which they were expected to manipulate pipe-cleaner chromosome models showing key features of mitosis, with every student getting approved for that, then showing key features of meiosis, and getting approved for that. [See my "" lab]. It's a wild lab, with me rushing around the room to check out individual efforts, while students work independently and interactively on showing those distinctive features, a la short, simple set of rules.

Adam S. Wilkins and Robin Holliday, “The Evolution of Meiosis from Mitosis,”  181 (2009): 3–12.
Click through the steps of this interactive animation to compare the meiotic process of cell division to that of mitosis: .

Genetics - Mitosis and Meiosis - Rapid Learning Center

Sexual reproduction requires that diploid organisms produce haploid cells that can fuse during fertilization to form diploid offspring. As with mitosis, DNA replication occurs prior to meiosis during the S-phase of the cell cycle. Meiosis is a series of events that arrange and separate chromosomes and chromatids into daughter cells. During the interphases of meiosis, each chromosome is duplicated. In meiosis, there are two rounds of nuclear division resulting in four nuclei and usually four daughter cells, each with half the number of chromosomes as the parent cell. The first separates homologs, and the second—like mitosis—separates chromatids into individual chromosomes. During meiosis, variation in the daughter nuclei is introduced because of crossover in prophase I and random alignment of tetrads at metaphase I. The cells that are produced by meiosis are genetically unique.

Mitosis vs Meiosis

Difference Between Mitosis and Meiosis | Difference …

Meiosis is preceded by an interphase consisting of the G1, S, and G2 phases, which are nearly identical to the phases preceding mitosis. The G1 phase, which is also called the first gap phase, is the first phase of the interphase and is focused on cell growth. The S phase is the second phase of interphase, during which the DNA of the chromosomes is replicated. Finally, the G2 phase, also called the second gap phase, is the third and final phase of interphase; in this phase, the cell undergoes the final preparations for meiosis.

A comparison of mitosis versus meiosis reveals several key differences.

Comparison of the processes of mitosis and meiosis.

Using the information above, compare these two simplified diagrams of mitosis and meiosis to visualize why cells are haploid after meiosis I. Specifically, compare the chromosomes in cells at the end of mitosis vs the end of meiosis I, recognizing that the diagram of mitosis tracks just a single pair of homologous chromosomes, whereas the diagram of meiosis tracks two pairs of homologous chromosomes (one long chromosome and short chromosome):