Day DateReadingTopic T10/15no class – October Vacation Th10/17More plant development T10/22Ch. 8Mechanisms of morphogenesis Th10/24More morphogenesis T10/29Ch. 10Cell differentiation Th10/31 Happy Halloween!Stem cells T11/5Ch. 11Organogenesis Th11/7More Organogenesis T11/12 Th11/14Ch. 12Development of the nervous system T11/19EXAM 2Chapters 2, 6, 8, 10 Th11/21Ch. 9 The saga of the germ cell T11/26More on reproductionYour term paper is due at the beginning of class on Tuesday, 11/19 Th11/28no class – Thanksgiving Break Also remember there are two, short writing assignments, each worth 20 points. Pick any topic in developmental biology (except your term paper topic) and learn more about it. Then write a two page paper and include all the sources you used (those can include any sources including web sites, newspapers, TV, etc). These are due anytime.

Genes to focus on during Drosophila embryogenesis Bicoid Hunchback Even-skipped Engrailed Antennapedia Hedgehog Wingless Gurken Toll Dorsal Decapentaplegic Short gastrulation

not in text

2.39 Hh/Wg 4 nuclei

2.37 clones in wing

Box 1E Wnt signal transduction

2.40 Hh signaling pathway

2.37 clones in wing

not in text: Dorsal handout

2.23 Dorsal /DPP grad.

2.21 D/V slice

Fig. 2.19

Comparing animals and plants: Invented multicellularity independently Some differences: No germ line cells in plants (plants are easy to clone. No maternal factors???) No morphogenesis in plants (very simple fate maps) Plant cells contain plasmodesmata (a type of gap junction between cells)

Comparing animals and plants: Invented multicellularity independently Some differences: No germ line cells in plants (plants are easy to clone. No maternal factors???) No morphogenesis in plants (very simple fate maps) Plant cells contain plasmodesmata (a type of gap junction between cells) 7.4 fate map

7.22 root fates

Comparing animals and plants: Invented multicellularity independently Some differences: No germ line cells in plants (plants are easy to clone. No maternal factors???) No morphogenesis in plants (very simple fate maps) Plant cells contain plasmodesmata (a type of gap junction between cells) Fig. 1.23

FT mRNA is transcribed in leaves and then the mRNA goes through plasmodesmata on the way to cells in the shoot meristem where it is translated into a transcription factor protein that regulates transcription of genes for flowering. Fig. 6.35

Comparing animals and plants: Invented multicellularity independently Some similarities: Totipotency (each cell retains the entire genome) Stem cells (called initials in plants) Stem cell niches (called meristems in plants) Homeotic genes (but the genes are different in plants vs animals)

7.10 stem/leaf pattern

Animal terms = totipotent, pluripotent Plant term = indeterminant