3.1 cell division

3
1. What is What are the importance? 1. Produce new cell for……………………………… 2. Replacement of cells and……………………… of tissues 3. ………………………………………………….which the production of new individuals of a species by one parent organism 4. Vegetative reproduction of 2. There are 2 types of cell division: (a)……………………………………………………………. (b)………………………………………………………......... Where? (a)Humans: (b)Plants: CHAPTER 3(HEREDITY & VARIATION) 3.1 CELL DIVISION(Pembahagian sel) The process of mitosis Is a thread-like structure found in the nucleus of a cell and contains long molecule called DNA 3. What is MITOSIS? Is a cell division process which a parent cell divides into………………………………identical daughter Chromosomes DNA(Deoxyribonucleic acids) Gene? Is double helix and made up of a series of genes Segmen of DNA Basic unit of inheritance

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mitosis and meoisis

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Page 1: 3.1 Cell Division

1. What is

What are the importance?1. Produce new cell

for………………………………2. Replacement of cells

and……………………… of tissues 3. ……………………………………………

…….which the production of new individuals of a species by one parent organism

4. Vegetative reproduction of plants involves mitosis

2. There are 2 types of cell division:(a)…………………………………………………………….

Where?

(a)Humans:

(b)Plants:

CHAPTER 3(HEREDITY & VARIATION)3.1 CELL DIVISION(Pembahagian sel)

The process of mitosis

Is a thread-like structure found in the nucleus of a cell and contains long

molecule called DNA

3. What is MITOSIS?Is a cell division process which a parent cell divides into………………………………identical daughter cell

Chromosomes?

DNA(Deoxyribonucleic acids)

Gene?

Is double helix and made up of a series of genes

Segmen of DNABasic unit of inheritance

Page 2: 3.1 Cell Division

MEIOSIS

Proses pembahagian nucleus sel untuk membentuk 4 sel anak dengan bilangan kromosom diseparuhkan

daripada sel induk.

Dimana berlaku?

ORGAN PEMBIAKAN

1. Manusia/Haiwan: Testis-spermaOvari-ovum

2. Tumbuhan: Anter-butir debungaOvari-ovul

Pindah silang (Crossing over)-Berlaku semasa pasangan kromosom tersusun di satah khatulistiwa sel-Bahan genetik daripada satu kromatid satu kromosom bertukar dengan bahan gentik kromosom yang lain.-Menyebabkan variasi genetik berlaku

KEPENTINGAN1. Proses yang menghasilkan gamet

2. Memastikan Zigot yang terhasil selepas persenyawaan mempunyai bilangan kromosom

yang sama dengan sel induk

3. Menyebabkan variasi genetik antara spesies-spesies yang sama melalui pindah

silang

Page 3: 3.1 Cell Division

Perbezaan di antara mitosis dan meiosis

CIRI Mitosis Meiosis

1. Tujuan Menghasilkan sel-sel baru Menghasilkan sel gamet

2. Tempat berlaku Dalam ……………………… Dalam sel organ pembiakan

3. Bilangan pembahagian bagi nukleus sel induk

4. Bilangan sel anak terhasil

5. Bilangan kromosom dalam sel anak berbanding dengan sel induk

6. Pindah silang kromosom

7. Variasi genetik

FASA-FASA MEIOSIS