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Lottie Peppers

Cell Division - Mitosis and Meiosis | ASU - Ask A Biologist - 0 views

askabiologist.asu.edu/...cell-division

mitosis meiosis article video time lapse mitosis ASU AskABiologist

shared by Lottie Peppers on 05 Oct 15 - No Cached
  • Mitosis Cell DivisionMitosis is how somatic—or non-reproductive cells—divide. Somatic cells make up most of your body's tissues and organs, including skin, muscles, lungs, gut, and hair cells. Reproductive cells (like eggs) are not somatic cells.In mitosis, the important thing to remember is that the daughter cells each have the same chromosomes and DNA as the parent cell. The daughter cells from mitosis are called diploid cells. Diploid cells have two complete sets of chromosomes.  Since the daughter cells have exact copies of their parent cell's DNA, no genetic diversity is created through mitosis in normal healthy cells. 
  • Lottie Peppers on 05 Oct 15
     
    Article summarizing cell division with time lapse cell division video of 30hours pro vs eukaryotic division.
Lottie Peppers

Scientists genetically engineered tricked-out rainbow zebrafish to study skin cells | T... - 0 views

www.theverge.com/...nbow-colorful-skin-cells-study

skin injury animal model zebrafish skin regeneration stem cells TheVerge

shared by Lottie Peppers on 30 Mar 16 - No Cached
  • Lottie Peppers on 30 Mar 16
     
    By observing how the cells in the zebrafish's skin responded to injury, the Duke team learned a lot about the skin regeneration process and were surprised by its complexity. They saw that in the hours following a fin amputation, for example, zebrafish regenerated skin through three different mechanisms: the "recruitment" of spare skin cells from other areas, a temporary doubling in size in some pre-existing cells, and the creation of completely new cells.
Lottie Peppers

A gene for brain size - only found in humans | Science News SciGuru.org - 0 views

www.sciguru.org/...e-brain-size-only-found-humans

neurology SciGuru brain size genomic sequencing DNA sequencing

shared by Lottie Peppers on 27 Feb 15 - No Cached
  • Lottie Peppers on 27 Feb 15
     
    The researchers isolated different subpopulations of human brain stem cells and precisely identified, which genes are active in which cell type. In doing so, they noticed the gene ARHGAP11B: it is only found in humans and in our closest relatives, the Neanderthals and Denisova-Humans, but not in chimpanzees. This gene manages to trigger brain stem cells to form a bigger pool of stem cells. In that way, during brain development more neurons can arise and the cerebrum can expand. The cerebrum is responsible for cognitive functions like speaking and thinking.
Lottie Peppers

Why Are Cells Small? | TED-Ed - 0 views

ed.ted.com/Hu8fIVA3

TED_Ed surface_area:volume cells cell size

shared by Lottie Peppers on 07 Sep 14 - No Cached
  • Lottie Peppers on 07 Sep 14
     
    Cells are everywhere. Even though most can't be seen with the naked eye, they make up every living thing. Your body alone contains trillions of cells. Students will be able to explain why cells are small and calculate a cell's surface area to volume ratio.
Lottie Peppers

Reference Links for Key Numbers in Biology - 0 views

bionumbers.hms.harvard.edu/KeyNumbers.aspx

reference BioNumbers size scale division replication transcription translation degradation concentration energy diffusion catalysis mutation rate genome size

shared by Lottie Peppers on 08 Mar 15 - No Cached
  • Lottie Peppers on 08 Mar 15
     
    Reference page cellular facts: cell size, lenth, division, concentration, energy, diffusion, genomic information, and mutation rates.
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