LabBench Activity

Key Concepts II: Meiosis

Meiosis follows phases similar to those in mitosis, but the outcome of the process is very different. The DNA of the parent cells is replicated in interphase preceding both mitosis and meiosis. However, in meiosis, replication is followed by two divisions.

Meiosis reduces the chromosome number of the parent cell so that four daughter cells are produced, each with one-half the chromosome number of the parent cell. Each daughter cell contains only one chromosome from each homologous pair.

In your laboratory you will do a simulation activity that helps you verify your understanding of the events of meiosis. We will not repeat this exercise here. Instead, we focus next on one particular aspect of meiosis, crossing over.