The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to...

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The OTHER way to divide

Transcript of The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to...

Page 1: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

The OTHER way to divide

Page 2: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

MeiosisMeiosis is another process of cell division. It is very similar to Mitosis and shares the

divisional phases.Unlike Mitosis the genetic material being

divided is similar but NOT exactly identical

Page 3: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

Mitosis (Short Simple and Sweet)Cell division of Diploid cellsCells that are created are exact copies of the

original.The Mother Cell creates 2 Daughter Cells

with the same amount of Chromosomes (2N) as the original.

Page 4: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

Mitosis (Short Simple and Sweet)Interphase consists of 4 Phases: G1, S, G2

and G0 During interphase cell grows in size and

determines if it can begin Mitosis.

Mitosis follows Interphase and consists of 4 Phases: Prophase, Metaphase, Anaphase and Telophase

Page 5: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

Mitosis CycleProphase: Chromosomes condense Body

spindles relocate, Nucleus dissolvesMetaphase: Chromosomes align at EquatorAnaphase: Chromatids separate and head to

opposite polesTelophase: Chromatids reach poles and cell

pinches creating two daughter cells

Page 6: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

The Stages of Meiosis

Page 7: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

Meiosis Meiosis is used during sexual reproduction.Meiosis uses Haploid cells from a mother

and father to create the first human cell.

The mother donates the Oocyte (egg cell)The Father donates the Spermacyte (sperm)

Page 8: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

MeiosisMeiosis uses the same 4 Phases as Mitosis but it goes through the division process 2x

Meiosis IProphase, Metaphase, Anaphase, Telophase

Meiosis IIProphase II, Metaphase II, Anaphase II and Telophase II

Page 9: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

The Beginning

The Cell begins by combining 23 Chromosomes from the mother (oocyte) and

father (spermacyte)

The Newly developed Cell has 46 Chromosomes (2N) @ Interphase

Page 10: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

Prophase

During Prophase the Chromosomes duplicate and join in homologous pairs.

Homologous Chromosomes – Chromosomes of similar size, length and shape that display the same genes.

Page 11: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

23 Homologous pairs

Page 12: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

ProphaseAfter Joining in Homologous pairs the cells

then begin to Crossover

Page 13: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

During Metaphase the Homologous pairs align at the Equator and stick near their matching counterpart.

During Anaphase one of the haploid pairs get pulled to a different pole

Page 14: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

During Telophase the chromosomes are enclosed in the nuclear membrane but do not untangle

Page 15: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

Meiosis IIFollows shortly behind Meiosis I

The process is similar to mitosis with different genetic results.There is NO Crossover or Chromosome Duplication!!!!The end result is production of four haploid cells (23 chromosomes, N) from the two haploid cells produced in meiosis I.

Page 16: The OTHER way to divide. Meiosis Meiosis is another process of cell division. It is very similar to Mitosis and shares the divisional phases. Unlike Mitosis.

Crash Course Meiosis