Welcome students to our
SCIENCE CLASS!
Sir Lindzie Swain G. Domen
Identical to parent cell
1 round of PMAT
DIVIDE AND CONQUER
4 haploid cells
2 rounds of PMAT
Mitosis
Meiosis
Sex cells
Body cells
2 diploid cells
UNIDENTICAL TO PARENT CELL
Topic Of The Day
CELL DIVISION:MEIOSIS
Sir Lindzie Swain G. Domen
REVISIT
IT'sSCI-MULATIONtime!
MEIOSIS
1. Involves sex cells (sperm cell and egg cell) or gametes.
2, • Reduces the chromosomes number in half from two sets (diploid) into a single set (haploid).
3. Two rounds of cell division (Meiosis I and Meiosis II)
4.Four daughter cells, each with half the chromosome number as the original parent cell (father and mother).
MEIOSIS 1
INTERPHASE
TII
G1, s pHASE, G2
P1
m1
PHASES OF MEIOSIS P.M.A.T
AII
A1
MII
t1
PII
MEIOSIS II
Cytokinesis
IT'sSCI-MULATIONtime!
GAMETOGENESIS
From the word “gamete” which means sex cells and “genesis” which means origin.
Egg Cell
Ovary
Sperm Cell
Testes
SPERMATOGENESIS
• Derived from the word “sperma” which means “sperm” and “genesis” which means “origin”. • The production of sperm cells in the testes. • Meiosis produces four small cells of similar size called spermatozoa or sperm.
OOGENESIS
• Derived from the word oo- which means “egg” and “genesis” which means “origin”. • The production of egg cells in the ovary.
• Meiosis I in the ovary, the cell will produce two cells -one big and one small (polar body) this polar body may or may not divide, if it does then 2 small cells are produced but will disintegrate.
• Meiosis II in the ovary, produces one big and one small cell from the first big cell in the meiosis I.
Why MEIOSIS important?
Ensures the correct number of chromosomes to an offspring.
Responsible for genetic variation.
SUMMARY
- Meiosis involves sex cells.
- Meiosis undergoes two rounds of PMAT (Meiosis I and Meiosis II)
- Meiosis results into differentiation and sexual reproduction of species.
- Meiosis results into genetic diversity.
TRUEorFALSE
TRUE
Meiosis is responsible for genetic variation and reproduction of species.
FALSE
TRUE
After meiosis 1, the cell will then enter again into the interphase (G1, S Phase and G2).
FALSE
TRUE
Humans have a total of 46 chromosomes in 23 pairs.
FALSE
TRUE
Gametogenesis is the production of body cells, such as skin cells, muscle cells and so on.
FALSE
TRUE
The purpose of crossing over during Prophase 1 is important in achieving genetic variation/diversity.
FALSE
GREAT JOB!
DO YOU HAVE ANY QUESTIONS?
Lorem ipsum dolor sit amet
LINDZIE SWAIN DOMEN
THANK YOU!Keep safe !
LESSON OBJECTIVES
Define MEIoSIS, OOGENESIS AND SPERMATOGENESIS
Explain the significance of meiosis in maintaining the chromosome number.
differenriate Spermatogenesis and Oogenesis.
IDENTIFY THE PHASEs OF MEOSIS
SCI-MULATION ofMEIOSIS
CELL DIVISION : MEIOSIS
Lindzie Swain Domen
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Transcript
Welcome students to our
SCIENCE CLASS!
Sir Lindzie Swain G. Domen
Identical to parent cell
1 round of PMAT
DIVIDE AND CONQUER
4 haploid cells
2 rounds of PMAT
Mitosis
Meiosis
Sex cells
Body cells
2 diploid cells
UNIDENTICAL TO PARENT CELL
Topic Of The Day
CELL DIVISION:MEIOSIS
Sir Lindzie Swain G. Domen
REVISIT
IT'sSCI-MULATIONtime!
MEIOSIS
1. Involves sex cells (sperm cell and egg cell) or gametes.
2, • Reduces the chromosomes number in half from two sets (diploid) into a single set (haploid).
3. Two rounds of cell division (Meiosis I and Meiosis II)
4.Four daughter cells, each with half the chromosome number as the original parent cell (father and mother).
MEIOSIS 1
INTERPHASE
TII
G1, s pHASE, G2
P1
m1
PHASES OF MEIOSIS P.M.A.T
AII
A1
MII
t1
PII
MEIOSIS II
Cytokinesis
IT'sSCI-MULATIONtime!
GAMETOGENESIS
From the word “gamete” which means sex cells and “genesis” which means origin.
Egg Cell
Ovary
Sperm Cell
Testes
SPERMATOGENESIS
• Derived from the word “sperma” which means “sperm” and “genesis” which means “origin”. • The production of sperm cells in the testes. • Meiosis produces four small cells of similar size called spermatozoa or sperm.
OOGENESIS
• Derived from the word oo- which means “egg” and “genesis” which means “origin”. • The production of egg cells in the ovary. • Meiosis I in the ovary, the cell will produce two cells -one big and one small (polar body) this polar body may or may not divide, if it does then 2 small cells are produced but will disintegrate. • Meiosis II in the ovary, produces one big and one small cell from the first big cell in the meiosis I.
Why MEIOSIS important?
Ensures the correct number of chromosomes to an offspring.
Responsible for genetic variation.
SUMMARY
TRUEorFALSE
TRUE
Meiosis is responsible for genetic variation and reproduction of species.
FALSE
TRUE
After meiosis 1, the cell will then enter again into the interphase (G1, S Phase and G2).
FALSE
TRUE
Humans have a total of 46 chromosomes in 23 pairs.
FALSE
TRUE
Gametogenesis is the production of body cells, such as skin cells, muscle cells and so on.
FALSE
TRUE
The purpose of crossing over during Prophase 1 is important in achieving genetic variation/diversity.
FALSE
GREAT JOB!
DO YOU HAVE ANY QUESTIONS?
Lorem ipsum dolor sit amet
LINDZIE SWAIN DOMEN
THANK YOU!Keep safe !
LESSON OBJECTIVES
Define MEIoSIS, OOGENESIS AND SPERMATOGENESIS
Explain the significance of meiosis in maintaining the chromosome number.
differenriate Spermatogenesis and Oogenesis.
IDENTIFY THE PHASEs OF MEOSIS
SCI-MULATION ofMEIOSIS