Briefly explain the differences in the chromosomal events between each of the following:a) interphase and interkinesis of meiosis b) prophase of mitosis and prophase I of meiosis c) anaphase of mitosis and anaphase I of meiosisd) synapsis and crossing-over Fill in the following chart.                                                             MITOSIS              MEIOSISFinal number of daughter cellsresulting from each parentcell Chromosomal complement ofdaughter cells (same as parentor different than parent) Is there genetic variabilityamong daughter cells? (yes/no) Give two examples of humancells produced by:

Expert Answers

An illustration of the letter 'A' in a speech bubbles

a) The interphase is a period in the meiosis (as well as mitosis) when the chromosome doubles. ie., DNA replication takes place.    Interkinesis is a period between telophase I and prophase II where no DNA replication takes place. Some changes like the reformation of nuclear envelope occurs.

b)...

Unlock
This Answer Now

Start your 48-hour free trial to unlock this answer and thousands more. Enjoy eNotes ad-free and cancel anytime.

Start your 48-Hour Free Trial

a) The interphase is a period in the meiosis (as well as mitosis) when the chromosome doubles. ie., DNA replication takes place.
    Interkinesis is a period between telophase I and prophase II where no DNA replication takes place. Some changes like the reformation of nuclear envelope occurs.

b) In prophase I of meiosis, chromosome condensation, synapsis, crossing over and separation of homologous pairs of chromosomes take place.
    In prophase of mitosis, this separation of homologous chromosomes or synapsis or crossing over do not occur.

c) In anaphase of mitosis, the spindle fibres are attached to the centromeres of chromosomes. Thus two chromatids separate and move to the opposite poles of the cell.
   In anaphase of meiosis, the entire chromosome of each pair will migrate to opposite poles as chromosome pairs had been aligned in metaphase I.

d) Synapsis refers to the coming together of homologous chromosomes, forming chiasmata and bivalents.
   This synapsis allows the taking place of crossing over. Crossing over is the breakage and rejoining of segments of non-sister chromatids enabling genetic variation in the gametes formed.

The chart is filled in below.
                                                             

                                                          MITOSIS         MEIOSIS

Final number of daughter cells
resulting from each parent                          2                    4
cell

Chromosomal complement of
daughter cells (same as parent               same              different
or different than parent)

Is there genetic variability
among daughter cells? (yes/no)               no                      yes

Give two examples of human
cells produced by                                nerve cells              egg cells
                                                        muscle cells             sperms

Approved by eNotes Editorial Team