Solutions to handout: Prac. Qs about mitosis

Front page:

First square:  Prophase.  Diploid.  2N=2.  Animal cell.  Equator would between between the homologous pairs of Xs

Second square:  Metaphase.  Equator would be drawn between the sister chromatids through the two centromeres.   Two centromeres.  Chromosomal spindle fibres (from the left and right sides) are attached to the centromeres.

Third square:   Anaphase.  Four total chromosomes (all single-copy).  Two single-copy chromosomes in each daughter cell.  Daughter cells will be diploid.

Fourth square:  Telophase.  Daughter cells are identical.  Cell plate would be drawn between the two nuclei, dividing the cytoplasm in half.

Back page:

In mitosis, the mother cell is diploid or 2N=4.  (Two different chromosome sets.  Two chromosomes per set.  All chromosomes are double-copy.)

In mitosis, the both daughter cells are diploid or 2N=4.  (Two different chromosome sets.  Two chromosomes per set.  All chromosomes are single-copy.)

In meiosis, the mother cell (gonad stem cell)  is diploid or 2N=4.  

After meiosis I, the two daughter cells are haploid or N=2.  (Two different chromosome sets.  One chromosome per set.  All chromosomes are double-copy. )

After meiosis II, the four daughter cells are haploid or N=2.  (Two different chromosome sets.  One chromosome per set.  All chromosomes are single-copy.)