2 Questions around this concept.
Which of the following does not occur when a cell enters the M phase?
Difference between mitosis and meiosis:
|
Characters |
Mitosis |
Meiosis |
|
Site of occurrence |
Somatic cells and during the multiplicative phase of gametogenesis in germ cells |
Reproductive germ cells of gonads |
|
Period of occurrence |
Throughout life |
During sexual reproduction |
|
Nature of cells |
Haploid or diploid |
Always diploid |
|
Number of divisions |
Parent cell divides once |
Parent cell divides twice |
|
Number of daughter cells |
Two |
Four |
|
Nature of daughter cells |
Genetically similar to parental cell. Amount of DNA and chromosome number is the same as in the parental cell |
Genetically different from the parental cell. Amount of DNA and chromosome number is half to that of the parent cell |
Difference between Meiosis I and Meiosis II:
|
Meiosis I |
Meiosis II |
|
Starts as diploid; ends as haploid |
Starts as haploid; ends as haploid |
|
Reductive division |
Equational division |
|
Homologous chromosome pairs separate |
Sister chromatids separate |
|
Crossing over happens |
Crossing over does not happen |
|
Complicated division process |
Simple division process |
|
Preceded by S-phase and G-phase |
Preceded only by G-phase |
|
Ends with 2 daughter cells |
Ends with 4 daughter cells |
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