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An illustration of the X and Y chromosomes

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
An illustration of the Southern Gastric Brooding Frog

Southern Gastric Brooding Frog-Image

By: Anna Guerrero | Published: Feb 06, 2017

The Southern Gastric Brooding Frog (Rheobotrahcus silus) was a frog species that lived in Australia. It was declared extinct in 2002.

EggsFrogsAustraliaTadpolesAmphibians--Larvae

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