Gap genes encode transcription factors, and differing combinations and concentrations of gap gene proteins regulate the transcription of pair-rule genes, which divide the embryo into periodic units.

TLS Online TPP Program

#Id: 1019

#Unit 5. Developmental Biology

The processes by which the three ectodermal regions are made physically and functionally distinct from one another is called neurulation.

TLS Online TPP Program

#Id: 1020

#Unit 5. Developmental Biology

Specification of the ectoderm is accomplished during gastrulation, by regulating the levels of BMP.

TLS Online TPP Program

#Id: 1021

#Unit 5. Developmental Biology

The vertebrate ectoderm, has 3 major responsibilities:

1. One part will become the neural plate

2. One part will become the epidermis

3. One part will become the neural crest

TLS Online TPP Program

#Id: 1022

#Unit 5. Developmental Biology

High levels of BMP specify the cells to become epidermis.

TLS Online TPP Program

#Id: 1023

#Unit 5. Developmental Biology

Very low levels of BMP specify the cells to become neural plate.

TLS Online TPP Program

#Id: 1024

#Unit 5. Developmental Biology

Intermediate levels of BMP effect the formation of the neural crest cells.