Meiosis Science Presentation in Blue Yellow Flat Graphic Style.pptx

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1. PICTO-WORD

2. Direction Analyze the photos below. Think of a word/concept or idea that is represented in each of the photo. The pictures will help you find the exact word that is being ask.

3. TOGENSIESMAGE GAMETOGENESIS

4. OGENSIESO OOGENESIS

5. TOERMSGENSIESAMP SPERMATOGENESIS

6. GEMETSA GAMETES

7. Role of Meiosis in Gametogenesis

8. Role of Meiosis in Gametogenesis Meiosis is a type of cell division that takes place during the creation of sex cells. During meiosis, the chromosome number is decreased by half. This is to ensure that the zygote would receive the exact number of chromosomes during fertilization. The creation of germ cells or gametes is referred to as gametogenesis. These gametes are used for sexual reproduction.

9. When these eggs and sperms unite during fertilization, a diploid zygote forms. The zygote has one full set of chromosomes received from each parent.

10. Male and female individuals produce their gametes through meiosis. In males, gametogenesis is known as spermatogenesis . This process produces spermatozoa (singular form is spermatozoon) or sperm cells.

11. Gametogenesis in females is known as oogenesis , since it produces oocytes and yields mature ova (singular form ovum) or egg cells. Both processes begin with meiosis.

12. What would happen if meiosis suddenly stops?

13. The process of meiosis is needed in the formation of gametes, sexual reproduction, and for the increase of genetic diversity. If there is no meiosis, reproduction among sexually producing creatures will never occur. Production of offspring would stop and eventually, no more future generations. The earth will suffer extinction of most species among multicellular eukaryotes.

14. What would happen when something goes wrong during meiosis?

15. Problems during meiosis sometimes happen and cause great harm during embryonic development. Accidents like miscarriages, genetic errors, and birth defects may occur. These accidents may affect the movement of the chromosomes and the functioning of the spindle fibers.

16. In humans, non-disjunction of the chromosomes in Meiosis 1 or Meiosis 2 have been known to cause abnormal conditions such as:

17. Down syndrome is a lso identified as Trisomy 21. Down syndrome features include intellectual disability, slow growth, abnormalities of the face or skull such as upward slanting eyes and a flattened face, and heart conditions. Down syndrome

18. Common physical characteristics of people with Down syndrome include: 1. short neck 2. small ears 3. small mouth 4. small stature 5. flattened nose Down syndrome 6. low muscle tone 7. upward slanting eyes 8. short hands and short fingers 9. Brushfield spots - or white spots on the colored part of the eye.

19. Cri-du-chat, the French for cat’s cry, is the sound of a baby having this condition when he/she cries. This is a genetic condition which is also known as 5p- (5p minus) syndrome and cat cry syndrome. Cri-du-chat Syndrome

20. Common physical characteristics of people with Cri-du-chat syndrome include: 1. small head size 2. widely-spaced eyes 3. round or moon-like face Cri-du-chat syndrome 4. high-pitched cat-like cry 5. low weight at birth and 6. weak muscle tone during infancy

21. Patau syndrome is also identified as Trisomy 13 syndrome. This is a condition in which each cell of the body of the affected individual has three copies of chromosome 13 instead of two which is the standard number. This results to an excess of genetic material which bring disruptions to the normal development of the individual. Patau Syndrome

22. 1. cleft lip 2. cleft palate 3. heart defects 4. weak muscle tone Patau syndrome 5. brain abnormalities 6. extra fingers or toes 7. eyes are poorly developed Common physical characteristics of people with Patau syndrome include:

23. Klinefelter Syndrome is also identified as 47, XXY syndrome. Babies with Klinefelter syndrome have one or two extra sex chromosomes. These babies are always boys and instead of having an XY chromosome pair, they have XXY or XXXY as their sex chromosomes. Klinefelter Syndrome

24. 1. small testes 2. breast enlargement 3. decreased bone density 4. decreased muscle mass Klinefelter syndrome 5. unusually small penis or micropenis 6. presence of few hair on the body and face Common physical characteristics of people with Klinefelter syndrome include:

25. Turner syndrome, a condition that affects only females, results when one of the X chromosomes (sex chromosomes) is missing or partially missing. Turner syndrome can cause a variety of medical and developmental problems, including short height, failure of the ovaries to develop and heart defects. Turner Syndrome

26. DIRECTION: Match COLUMN A with the correct answer in COLUMN B. Draw a LINE to connect column a to column b.

27. COLUMN A COLUMN B Down Syndrome a. Nose are usually large (bulbous) 2. Edwards Syndrome b. Abnormalities of the face or skull such as upward slanting eyes. 3. Klinefelter Syndrome c. They have a small head size with a prominent back of the head 4. Patau Syndrome d. Shinkage of the testicles and development of breast. 5. Turner Syndrome e. Webbed neck, skeletal deformities, a broad chest with widely spaced nipples.

28. Fact Or Bluff

29. 1. Meiosis is important in sexual reproduction. FACT

30. 2. Meiotic division produces four (4) haploid cells having the same number of chromosomes from the parent cell. FACT

31. 3. The sperm and egg cells of human contain of 46 single chromosomes after meiotic division. BLUFF

32. 4. Meiosis ensures that offspring gets one half of the chromosomes from the mother and one half from the father. FACT

33. The formation of gametes is generally called gametogenesis. This process can be classified into two, what are those? Spermatogenesis and oogenesis

34. When something goes wrong during meiosis, what are the different disorder or abnormalities happened? Down Syndrome or Trisomy 21 Cri-du-chat Syndrome Patau Syndrome or Trisomy 13 Klinefelter Syndrome Turner Syndrome

35. Create a collage that depicts the means/ways in taking good care of persons with chromosomal disorders. You can cut pictures or images from old printed materials such as newspapers, magazines, brochures, etc.