Science Questions and Answers

Start Your Free Trial

 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 info

selmasharafaz eNotes educator | Certified Educator

calendarEducator since 2013

write47 answers

starTop subjects are Science, Math, and Social Sciences

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...

(The entire section contains 231 words.)

Unlock This Answer Now












check Approved by eNotes Editorial


Zaca | Student

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.