Meiosis I and II activity

Friday we had our DQQ and then you had time to finish up the book work on this section.

Monday February 25^th

*Meiosis II is similar to mitosis in the fact that during metaphase and anaphase Sister Chromatids line up and separate from each other.

*At the end of meiosis II we now have 4 cells that are considered Haploid because each has One set of DNA

*True or False:  Each of the resulting cells are identical.

Which statement BEST describes how endocytosis differs from diffusion?

A.  Unlike diffusion, endocytosis requires energy

B  Unlike diffusion, endocytosis focuses on small particles

C.  Unlike diffusion, endocytosis allows substances to enter a cell

D.  Unlike diffusion, endocytosis relies on the structure of a cell wall.

After this we used the magnet boards to go through both meiosis I and meiosis II.(See pics and descriptions below. 

We would first start with a cell with unreplicated DNA

During the S phase of interphase
the DNA would replicate.  Now all the
chromosomes are duplicated with identical
sister chromatids

During phrophase 1 the homologous chromosomes
pair up with each other (blue from dad, red from mom)

And crossing over may occur.  During crossing over
the DNA from one chromosomes may "swap" with the
DNA of its homolog.

Making for chromosomes with combinations of both
maternal and paternal DNA

During Metaphase I  Homologous
Chromosomes line up at the equator (middle)

Durin Anaphase I these Homologous
chromosomes then pull apart from each other

Now we have TWO cells with a different combination
of the father and mothers DNA

During Metaphase, each cell will now have
the sister chromatids move the middle of each
cell.

During anaphase those sister chromatids will now pull apart
from each other.

Finally during telophase 4 cells will be created,
each with a different combination of that persons mother and father's DNA

To wrap this section up I had you watch the following podcast.