Egg Before Chicken, Dr. Arnaldo Carreira-Rosario, 2017
About the Science
How is genetic information passed from one generation to the next? To answer this question, scientists study the contribution from both male and female gametes (sperm and ovum). Interestingly, the female gamete includes not only the genetic information, but crucial parts of the cell (called organelles) such as mitochondria. This is a picture of an oocyte - which will develop into a female gamete. With the use of staining techniques and microscopy, scientists study the different cells that form an egg to learn how they develop. This is an image taken from a developing egg chamber where the small blue circles will ultimately become the eggshell, the large yellow circles are supporting cells that provide nutrients to the developing oocyte, and red sphere is the oocyte itself.
About the Scientist
Arnaldo grew up in Puerto Rico. He did his Bachelors at the University of Puerto Rico in Mayagüez. He then went to UT-Southwestern in Dallas, Texas to study how RNA-binding proteins influence germline stem cell differentiation guided by Michael Buszczak. As a post-doc at Stanford University, Arnaldo is training to become an expert in systems neurodevelopment under the mentorship of Chris Doe and Tom Clandinin. He is particularly interested in how activity within short periods of time during nervous system development affects circuit function for the entire life of the organism. Outside the lab he likes to play soccer, try new restaurants and visit friends and family around the US, Puerto Rico and Turkey.
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