chelle.meiosis and amitosis

Slide 1: 

Group 5 PRESENTS!

Slide 2: 

To the WORLD of Meiosis And Amitosis

Name: Rouchelle M. Alvarez Anna Rose Maloles: 

Name: Rouchelle M. Alvarez Anna Rose Maloles ∞1876- discovered and described in sea urchin eggs my Oscar Her twig ∞1883- described again by Eduard Van Beneden ∞1890- August Weismann ∞1991- Thomas Hunt Morgan ∞1905- coined by J.B Farmer J.B Moore II. • Meiosis I a. Prophase I b. Metaphase 1 c. Anaphase 1 d. Telophase 1 • Meiosis 2 a. Prophase 2 b. Metaphase 2 c. Anaphase 2 d. Telophase 2 History Division of Meiosis

Slide 4: 

Types of Amitosis 1 . Binary fission- In this type of fission, the body of the parent is divided into two approximately equal parts, each of which grows into an individual similar to the parent. This type of amitosis is common among protozoan. II. Budding- This involve the unequal division of the organism. The new individual arises as an outgrowth (bud) from the parent. The bud develops organs like that of the parents and the detaches itself. FORMS: A. External Budding- the bud is formed on the surface of the parent. B . Internal Budding- the bud is formed within the parent’s body (called gemmules / internal buds). Several gemmules maybe formed, surrounded by a dense covering in the body wall. When the body of the parent disintegrates, each gemmule gives rise to a new individual. AMITOSIS

Sporulation or Multiple Fission- An organism breaks into more than two parts, each capable of becoming a complete animal.: 

Sporulation or Multiple Fission- An organism breaks into more than two parts, each capable of becoming a complete animal. A. Asexual phase- two individual fuse temporarily and exchange nuclear materials. Although two parents are involved, they cannot be designated as male or female. B. Sexual phase- after nuclear exchange, to the animals separate where each divide into two to produce four offspring. Conjugation

III.: 

III. Meiosis facilities stable sexual reproduction. Maintains fixed number on chromosomes. KEYWORDS; homologous haploid chromosomes cells centromere kinetochore chromatids protoplasm protozoa prokaryote chloroplast KEY PERSONS : Oscar Hertwig Thomas Hunt Morgan Eduard Van Beneden J.B Farmer August Weismann J.B Moore SIGNIFICANE

DISCUSSION / CONTENT: 

DISCUSSION / CONTENT In this report, we will discuss about meiosis and amitosis including their types/ division. we will share to you the stages of cell division in meiosis and amitosis and how it formed. ENJOY IN THE DISCUSSION … LISTEN CAREFULLY !! AND FOR DEEP UNDERSTANDING

: 

Is a special type of cell division necessary for sexual reproduction. In animals, meiosis produce gametes like sperm and egg cells , while in other organism like fungi it generates spores . Meiosis begins with diploid cell containing two copies of each chromosomes – one from the organism’s and one from its father – and produces four haploid cells containing one copy of each chromosomes . MEIOSIS

Slide 9: 

Separates homologous chromosomes, producing two haploid cells. (N chromosomes, 23 in humans), some meiosis I is referred to as a reductional division . A regular diploid human cell contains 46 chromosomes and is considered 2N because in contains 23 pairs of homologous chromosomes. However, after meiosis 1, although the cell contains 46 chromatids , it is only considered as being N, with 23 chromosomes. Meiosis 1

Slide 10: 

Is the second part of the meiotic process is similar to mitosis. The end result is production of four haploid cells ( 23 chromosomes , N in humans) from the two haploid cells ( 22 chromosomes , N* each of the chromosomes consisting of two sister chromatids ) produced in meiosis i . The four main steps of meiosis II are : Prophase 2, Metaphase 2, Anaphase 2 and Telophase 2. Meiosis 2

Slide 11: 

Comparison between meiosis and amitosis

Slide 12: 

An usual form of cell division in which the nucleus cleaves without change in its component structure (such as the information of chromosomes), followed by the division of the cytoplasm. Amitosis may occur chiefly in highly specialized cells which are incapable of long-continued multiplication, in transitory structures and un early stages of degeneration. Amitosis

Slide 13: 

AMITOSIS STRUCTURE

Slide 14: 

Meiosis is a special type of cell division necessary for sexual reproduction. Cell division that results to haploid cells. Meiosis was discovered an described in sea urchin in 1876 by Oscar Hertwig , described again in 1883 by Eduard Van, 1890 by August Weismann, 1991 by Thomas Hunt Morgan the term meiosis was coined by J.B Farmer and J.B Moore in 1905. Meiosis 1 separates homologous chromosomes, producing 2 haploid cells .AND it have 4 stages as follows: SUMMARY

Slide 15: 

Prophase I- Crossing over can occur during the latter part of this stage. b. Metaphase I- homologous chromosomes align at the equatorial plate. c. Anaphase I- Homologous pairs separate with sister chromatids migrate separately to each pole d. Telophase I- Two daughter cells are formed with each daughter containing only on chromosomes of the homologous FIRST DIVISION OF MEIOSIS

Slide 16: 

a. Prophase 2- DNA does not replicate b. Metaphase 2- Chromosomes align at the equatorial plate c. Anaphase 2- Centromeres divide and sister chromatids migrate separately to each pole d. Telophase 2- Cell division is complete. Four haploid daughter cells are formed. Second Division of Meiosis

Slide 17: 

•Binary fission •Budding a. External Budding b. Internal Budding • Sporulation or Multiple Fission •Conjugation a. Asexual phase b. Sexual phase AMITOSIS consist or four types namely:

Slide 18: 

In meiosis, crossing- over or genetic recombination occur in ____stage. Meiosis (1) separate homologous chromosomes, producing ____cells. In what stage that daughter cell are formed with each cell containing only one chromosomes of the homologous pair. Meiosis was coined in 1905______ and _____. Give (1) significance or importance on meiosis. Type of amitosis tat involves the unequal division of the organism _______. In occur chiefly in highly specialized cells which are incapable of ling continued multiplication, in transistor structure________. Two forms of budding in amitosis. In this type, the body of the parent is divided into two approximately equal part ______. A form of conjugation that two individuals fuse temporarily and exchange nuclear materials_________. EXERCISE / QUIZ

Slide 19: 

f or appreciating our SIMPLE PRESENTATION.. THANK YOU VERY MUCH !