We have an assignment at school where we have to investigate the periodic motion of a mass on a spring. The first task is the model a displacement vs time of the mass on spring but I know how to do that because we are using Datalogger.
Two divisions, and , are required to produce gametes (Figure 3). Meiosis I is a unique that occurs only in germ cells; meiosis II is similar to a mitotic division. Before germ cells enter meiosis, they are generally , meaning that they have two copies of each chromosome.
Sometimes, during the first part of meiosis, something called crossing over occurs. This is when two chromosomes pair up and exchange segments of genetic material. This exchange of genetic material allows for genetic recombination, which is the creation of genetic material that is different from that of the parents.