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...

 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 meiosis

d) synapsis and crossing-over

Fill in the following chart.
                                                             MITOSIS              MEIOSIS
Final number of daughter cells
resulting from each parent
cell

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

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

Give two examples of human
cells produced by:

2 Answers | Add Yours

selmasharafaz's profile pic

selmasharafaz | College Teacher | (Level 3) Adjunct Educator

Posted on

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

Zaca's profile pic

Zaca | Student, Undergraduate | (Level 1) Salutatorian

Posted on

a) interphase and interkinesis of meiosis

- interphase : Happens in all cells; DNA is replicated

- interkinesis: Only happens between meiosis; DNA is not replicated

b) prophase of mitosis and prophase I of meiosis

- prophase:Chromatin condenses into chromosomes

-prophase I: Chromosomes line up and cross over

c) anaphase of mitosis and anaphase I of meiosis

-anaphase: Chromosomes themselves split into sister chromatids

anaphase I: Chromosomes don't split, but pairs of homologous chromosomes are split.

d) synapsis and crossing-over

-Synapsis: The act of homologous chromosomes paring up

-Crossing over: After the chromosome as paired, the switching of DNA between chromosomes

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

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

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

Give two examples of human             skin/hair           egg/sperm
cells produced by:

This table is hard to format, hopefully it turns out readable. The Answers are in bold.

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