Comb shapes in chickens

9/16 walnut (R- P-)

3/16 rose (R- pp)

3/16 pea (rr P-)

1/16 single (rr pp)

TLS Online TPP Program

#Id: 7380

#Unit 5. Developmental Biology

Oskar mRNA becomes complexed to kinesin I, a “plus-directed” motor protein that moves it toward the growing end of the microtubules at the posterior region, where Oskar protein can bind nanos mRNA

TLS Online TPP Program

#Id: 7169

#Unit 5. Developmental Biology

The major candidate for the factor that forms the Nieuwkoop center was β-catenin (This multifunctional protein also proved to be a key player in the formation of the dorsal amphibian tissues)

TLS Online TPP Program

#Id: 9081

#Unit 4. Cell Communication and Cell Signaling

The increase in K+ permeability hyperpolarizes the membrane, which reduces the frequency of heart muscle contraction.

TLS Online TPP Program

#Id: 2907

#Unit 3. Fundamental Processes

The function of DnaC is that of a chaperone to repress the helicase activity of DnaB until it is needed.

TLS Online TPP Program

#Id: 1037

#Unit 5. Developmental Biology

Primary neurulation can be divided into four stages:

1. Elongation and folding of the neural plate

2. Bending of the neural plate

3. Convergence of the neural folds

4. Closure of the neural tube