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DNA and X and Y Chromosomes
By: Anna Guerrero
| Published: Feb 06, 2017
Y-chromosomes exist in the body cells of many kinds of male animals.
Y ChromosomeX chromosomeSex ChromosomesChromosomesSex Chromatin
Mitochondria - Image
By: Anna Guerrero
| Published: Feb 06, 2017
Mitochondria are organelles found in the cytoplasm of eukaryotic cells. They are composed of an outer membrane and an inner membrane.
Cell organellesMitochondriaEukaryotic cellsMitochondrionOrganelles
Chloroplasts
By: Anna Guerrero
| Published: Feb 06, 2017
Chloroplasts are the organelles in plant and algal cells that conduct photosynthesis.
ChloroplastsPlastidsChloroplast membranesThylakoidsChlorophyll
Beadle and Tatum's 1941 Experiments with Neurospora Revealed that Genes Produce Enzymes
By: Amy Pribadi
| Published: Oct 12, 2016
This illustration shows George Beadle and Edward Tatum's experiments with Neurospora crassa that indicated that single genes produce singl
Neurospora crassaMicrobiologyX-raysGeneticsEnzymes
Neurospora crassa Life Cycle
By: Amy Pribadi
| Published: Oct 12, 2016
This diagram shows the life cycle of Neurospora crassa, a mold that grows on bread. N.
Neurospora crassaMicrobiologyMicroscopyGrowthdevelopment
Beadle's One Gene-One Enzyme Hypothesis
By: Amy Pribadi
| Published: Oct 12, 2016
Between 1934 and 1945, George Beadle developed a hypothesis that each gene within the chromosomes of organisms each produced one enzyme.
CellsGeneticsEnzymesGenesAmino Acids
Beadle and Ephrussi’s Technique to Transplant Optic Discs between Fruit Fly Larvae
By: Amy Pribadi
| Published: Oct 11, 2016
In 1935, George Beadle and Boris Ephrussi developed a technique to transplant optic discs between fruit fly larvae.
Fruit-fliesImaginal DisksGeneticsdevelopmentMetamorphosis, Biological
Neurospora crassa
By: Amy Pribadi
| Published: Oct 11, 2016
Neurospora crassa is a red mold that scientists use to study genetics. N.
Neurospora crassaMicrobiologyMicroscopyCulture MediaMolds
Beadle and Ephrussi Show that Something Besides Eye Tissue Determines Eye Color in Fruit Flies
By: Amy Pribadi
| Published: Oct 11, 2016
In the 1930s, George Beadle and Boris Ephrussi discovered factors that affect eye colors in developing fruit flies.
Fruit-fliesImaginal DisksGeneticsdevelopmentMetamorphosis, Biological
The Development of the Neural Crest and the Migration of Neural Crest Cells (NCCs) in the Embryos of Various Vertebrates
By: Brian K. Hall
| Published: Aug 21, 2014
This diagram shows how NCCs migrate differently in rats, birds and amphibians.
Neural CrestEmbryosVertebratesGerm LayersEctoderm