Problem :
Which of the following figures represents likely resulting cells of the first
meiotic division?
Figure 3, on the far left is the more likely product of the first meiotic
division for two reasons. First, its diploid pairs stem from only one parental
source. Second, it contains regions of genetic crossover
Problem :
Which is the longest phase of meiosis?
Prophase 1 can last up to 90% of the entire duration of meiosis because the very
important genetic reassortment event occurs during it.
Problem :
Are the sister chromatids present in a cell in prometaphase 1 identical?
No. While they are very similar, sister chromatids in prometaphase 1 are
slightly different because of the small segment of crossover between parental
homologous pairs that results from prophase 1 genetic reassortment.
Problem :
Fill in the blanks. During mitosis, chromosomes are separated by microtubules
attached to
their their _________. In meiosis, on the other hand, a microtubule attaches to
a structure called a _________.
Kinetochores or centromeres. Chiasma.
Problem :
What is the main difference between the events of anaphase 1 and those of
mitotic anaphase?
During anaphase, maternal and paternal sister chromatids are separated to
opposite ends of the cell via microtubules. In anaphase 1 of meiosis, the
maternal homologous pair and the paternal homologous pair are separated to
opposite ends of the cell before division.
