Без темы
<<  Мистецький арсенал Митохондрии и пластиды  >>
Mitosis
Mitosis
Learning Objectives
Learning Objectives
Word stem
Word stem
Cellular Organization of Genetic Material
Cellular Organization of Genetic Material
Cell Reproduction
Cell Reproduction
Mitosis
Mitosis
In Eukaryotes
In Eukaryotes
Mitosis
Mitosis
2 phases (stages) of Cell Cycle
2 phases (stages) of Cell Cycle
Interphase
Interphase
http://scienceblogs
http://scienceblogs
Mitosis
Mitosis
Mitosis
Mitosis
Mitosis: Stages
Mitosis: Stages
Mitosis
Mitosis
Mitosis
Mitosis
Cytokinesis
Cytokinesis
Mitosis
Mitosis
Functions of mitosis
Functions of mitosis
Consequences of uncontrolled cell division
Consequences of uncontrolled cell division
Homework
Homework

Презентация: «Митоз 11 класс». Автор: Nestor Hilvano. Файл: «Митоз 11 класс.ppt». Размер zip-архива: 1881 КБ.

Митоз 11 класс

содержание презентации «Митоз 11 класс.ppt»
СлайдТекст
1 Mitosis

Mitosis

Nestor T. Hilvano, M.D., M.P.H. (Images Copyright Discover Biology, 5th ed., Singh-Cundy and Cain, Textbook, 2012.)

2 Learning Objectives

Learning Objectives

1. Give the meaning of following word stems. - auto, bi, centro, cyto, di, haplo, gamet, gen Describe the phases (stages) and significance of cell cycle. Describe the phases of mitosis. Compare cytokinesis in animals and plants. Discuss the functions of mitosis. Explain how anchorage, cell density and growth factors control the cell. Explain how cancer cells are different from healthy cells.

3 Word stem

Word stem

auto – self soma - body bi - two centro - center cyto - cell di - two

haplo – single gamet – wife or husband gen – produce homo – like meio – less mito – thread

4 Cellular Organization of Genetic Material

Cellular Organization of Genetic Material

All the DNA in a cell constitutes the cell’s genome DNA molecules in a cell are packaged into chromosomes Somatic cells (nonreproductive cells) have two sets of chromosomes (diploid chromosomes)(2n) Gametes (reproductive cells: sperm and eggs) have 1 set (haploid) chromosomes (1n) Asexual reproduction- one parent cell (2n) divides into two daughter cells (2n); identical DNA (cloning) Sexual reproduction- two parents gametes (1n) formed into a unique new organism (2n)

5 Cell Reproduction

Cell Reproduction

Prokaryotes - reproduce by binary fission - one chromosome replicates equally to 2 daughter cells Eukaryotes - mitosis - chromosome duplicates to form sister chromatids, which separate during cell division to form chromosome to daughter cells. - chromosomes from both parents - DNA duplicates = 4 sets (tetrads)

6 Mitosis
7 In Eukaryotes

In Eukaryotes

0.5 µm

Chromosomes

DNA molecules

Chromo- some arm

Chromosome duplication (including DNA synthesis)

Centromere

Sister chromatids

Separation of sister chromatids

Centromere

Sister chromatids

Fig. 12-4

8 Mitosis
9 2 phases (stages) of Cell Cycle

2 phases (stages) of Cell Cycle

Interphase – chromosomes duplicate and cells parts are made Mitotic (M) phase a) mitosis, division of nucleus b) cytokinesis, the division of cytoplasm

10 Interphase

Interphase

90% of the total cycle time, divided into 3 subphases: G1 phase (first gap) – cell grows in size S phase (DNAsynthesis) – chromosomes are duplicated (sister chromatids formed) G2 phase (second gap) – cell continue to prepare for the actual division

11 http://scienceblogs

http://scienceblogs

com/transcript/2006/08/new_evidence_for_endosymbiotic.php

12 Mitosis
13 Mitosis
14 Mitosis: Stages

Mitosis: Stages

Prophase – mitotic spindle forming, aster centrosomes migrate, 2 sister chromatids joined at centromere, nuclear envelope and nucleoli disperse/disappear Metaphase – chromosomes aligned single file on the metaphase plate Anaphase – chromosomes (sister chromatids) separate from the centromere, dividing to arrive at opposite ends of the cell Telophase – the reverse of prophase; chromatids unwind, nucleus divides into 2 genetically identical daughter nuclei

15 Mitosis
16 Mitosis
17 Cytokinesis

Cytokinesis

Cytokinesis – division of cytoplasm a) animal cell – cleavage furrow b) plant cell – cell plate

18 Mitosis
19 Functions of mitosis

Functions of mitosis

Development Growth Replacement/ repair

20 Consequences of uncontrolled cell division

Consequences of uncontrolled cell division

Tumor a) benign tumor – lump remains at the original site b) malignant tumor – invades surrounding tissues and can metastasize - Cancers 1. carcinomas – epithelial cancers 2. sarcomas – supporting/connective tissue cancers 3. leukemias and lymphomas – blood-forming cancers.

21 Homework

Homework

1. Define – mitosis, cytokinesis, interphase, gametes, somatic cell, genome 2. Compare and contrast the stages of mitosis in prophase, prometaphase, metaphase, anaphase, and telophase. 3. Compare cytokinesis in animals and plants. 4. Distinguish between benign and malignant tumors. 5. Describe binary fission in prokaryotes (bacteria and archaea). 6. Discuss 3 factors that affect cell division.

«Митоз 11 класс»
http://900igr.net/prezentacija/bez_uroka/mitoz-11-klass-118236.html
cсылка на страницу

Без темы

23688 презентаций
Урок

Без урока

1 тема
Слайды