{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chapter 6 - Cellular mechanisms of development

Chapter 6 - Cellular mechanisms of development - Cellular...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Cellular mechanisms of development Overview of development - Development is the successive process of planned, gene-directed changes throughout an organism’s life cycle - Four processes bring about the changes: o Celldivision & cleavage o Differentiation o Pattern formation o Morphogenesis Morphogens - Molecules that affect developmental fate - Initiate and terminate the four processes - Bring about cell determination - Can be proteins, mRNAs, or other molecules - Obtained in a couple of different ways: o Inherited in cytoplasm from the egg: cytoplasmic determinants o Received as signals from other cells: induction agents Cytoplasmic determinants - Deposited in egg cytoplasm during oogenesis o Cytoplasm contains many different determinants o Each is localized to a particular part of the egg o Cells inherit a portion of the egg cytoplasm; thus different sets of cytoplasmic determinants
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
o Puts cells on different developmental trajectories o Especially active early in development Induction -
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}