1 / 15

Early development and aging

Early development and aging. I. Embryonic development. A. Cleavage 1. zygote to morula to blastula 2. blastocyst 3. cleavage position and fate 4. the beginning of differentiation 5. accomplishments of cleavage B. Gastrulation 1. the main events 2. 3 germ layers

Download Presentation

Early development and aging

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Early development and aging

  2. I. Embryonic development A. Cleavage 1. zygote to morula to blastula 2. blastocyst 3. cleavage position and fate 4. the beginning of differentiation 5. accomplishments of cleavage B. Gastrulation 1. the main events 2. 3 germ layers a. endoderm b. mesoderm c. ectoderm 3. two great groups of animals C. Neurulation

  3. Day 1: fertilization 10 hours

  4. 1. Cleavage blastula morula Two accomplishments of cleavage

  5. 1. Cleavage

  6. 2. Gastrulation Germ layers ectoderm mesoderm endoderm blastopore

  7. 3. Fate of the germ layers Blastopore?

  8. Two great groups of animals Protostomes: blastopore becomes a mouth Deuterostomes: blastopore becomes an anus

  9. Deuterostomes

  10. Neurulation Neural tube develops from the endoderm

  11. II. HOX genes Evolutionarily conserved gene sequences

  12. III. Theories of aging Genetic clock theory 1. Protein in non dividing cells 2. Telomeres and embryonic cells 3. Diseases of aging: Progeria and Alzheimer’s 4. Organs programmed 5. Genes for aging in fruit flies and mice 6. Ink4 protein Wear and tear theory 1. Errors in DNA replication 2. Accumulation of metabolic garbage 3. Environmental insults Reproductive obsolescence

  13. The new generation Japan, Australia,France, Sweden, Spain, Italy US: 24th Lowest 23: sub- Saharan Africa

  14. The End

More Related