Genes and Body Plans
- Created by: vezting
- Created on: 07-12-15 10:15
View mindmap
- Genes and Body Plans
- Control of development
- Homeotic genes have regions - homeobox sequences
- homeobox sequence code for proteins- homeodomain
- homeodomain binds to specific dna sites, protein is transcription factor
- proteins binds start developmental gene, it activates or represses, altering protein production of body plans,
- homeodomain binds to specific dna sites, protein is transcription factor
- homeobox sequence code for proteins- homeodomain
- Homeotic genes have regions - homeobox sequences
- body plan
- proteins control development of body plan. things grow in right place. controlled by proteins coded from homeotic genes
- apoptosis
- programmed cell death in multicellular organisms
- controlled by signal cells inside and out of cell EG Cytokines, hormones, growth factors, nitric oxide
- nitric acid induce apoptosis, inner mitochondrial membrane becomes permeable to H ions, dissipating proton gradient, proteins released in cytosol.
- proteins bind apoptosis inhibitors allowing process to take place
- nitric acid induce apoptosis, inner mitochondrial membrane becomes permeable to H ions, dissipating proton gradient, proteins released in cytosol.
- controlled by signal cells inside and out of cell EG Cytokines, hormones, growth factors, nitric oxide
- programmed cell death in multicellular organisms
- Apoptosis process
- 1: enzymes break down cytoskeleton
- 2: cytoplasm dense, organelles packed
- 3: cell surface membrane changes. blebs form
- 4: chromatin condenses, nuclear envelope breaks down, dna breaks into fragments
- 5: cell becomes vesicles.
- 6: vesicles taken up by phagocytosis
- this process is very quick
- Control of development
Comments
No comments have yet been made