Repro1 Flashcards
What are the important genes of embryogenesis?
Sonic Hedgehog gene
Wnt-7 gene
FGF gene
Homeobox (Hox) gene
Where is sonic hedgehog gene produced?
Base of limbs in Zone of Polarizing activity
What is sonic hedgehog involved in?
Patterning along Anterior-Posterior Axis
CNS development
A mutation in Sonic Hedgehog gene can cause what?
Holoprosencephaly
Where is Wnt-7 gene produced?
Apical Ectodermal Ridge
-thickened ectoderm at distal end of each developing limb
Wnt-7 gene is necessary for what?
Proper organization along dorsal-ventral axis
Where is FGF gene produced?
Apical ectodermal ridge
What is the role of the FGF gene?
Stimulates Mitosis of underlying Mesoderm
-Lengthening of limbs
What is Homeobox (Hox) genes involved in?
Segmental organization of embryo in the Craniocaudal direction
What happens in Hox mutations?
Appendages in wrong locations