Meiosis
, INtroduction
Meiosis is a special type of cell division that halves the
number of chromosomes.
Four genetically different haploid daughter cells are
formed from one diploid cell.
Meiosis is important because:
• haploid gametes are produced
• the doubling effect of fertilization on chromosome
number of future generations is overcome
• genetic variation occurs
, Significance of DNA replication for
meiosis
Each species of living organism has a characteristic number of
chromosomes found floating in the nucleoplasm of the nucleus.
• When the cell is not dividing, the genetic material forms a tangled
chromatin network.
• During interphase, DNA replication takes place.
• Single-stranded chromosomes become double-stranded.
• Each chromosome will now consist of two chromatids joined by a
centromere.
• This ensures the sharing of the hereditary material by all the
daughter cells that will be formed.
, INtroduction
Meiosis is a special type of cell division that halves the
number of chromosomes.
Four genetically different haploid daughter cells are
formed from one diploid cell.
Meiosis is important because:
• haploid gametes are produced
• the doubling effect of fertilization on chromosome
number of future generations is overcome
• genetic variation occurs
, Significance of DNA replication for
meiosis
Each species of living organism has a characteristic number of
chromosomes found floating in the nucleoplasm of the nucleus.
• When the cell is not dividing, the genetic material forms a tangled
chromatin network.
• During interphase, DNA replication takes place.
• Single-stranded chromosomes become double-stranded.
• Each chromosome will now consist of two chromatids joined by a
centromere.
• This ensures the sharing of the hereditary material by all the
daughter cells that will be formed.
