Th10/2 Ch. 2Molecular development of Drosophila T10/7More molecular development of Drosophila Th10/9Ch. 7Plant development On Thursday, 10/9, Please bring.

Th 10/2 Ch. 2 Molecular development of DrosophilaT 10/7 More molecular development of DrosophilaTh 10/9 Ch. 7 Plant developmentOn Thursday, 10/9, Please bring a copy of the primary research article you have selected (or more than one if you haven’t decided) plus your notes on the article. T 10/14 no class – October Vacation Th 10/16 More plant developmentT 10/21 Ch. 8 Mechanisms of morphogenesisTh 10/23 More morphogenesisT 10/28 Ch. 10 Cell differentiationTh 10/30 Happy Halloween Eve! Stem cellsT 11/4 Ch. 11 OrganogenesisTh 11/6 More Organogenesis

11/10 NO CLASS Veteran’s Day T 11/11 EXAM 2 Chapters 2, 6, 8, 10 Th 11/13 Ch. 12 Development of the nervous system T 11/18 More neural developmentYour review paper is due at the beginning of class on Tuesday, 11/18

From our course web site: “Assignments Explained”

two short writing assignments: Each worth 20 points. At any point during the semester, pick any topic in developmental biology from class, text, web, TV, or anywhere and learn more about it. Keep track of all the sources you use (Wikipedia etc.) to learn more and then write a two page paper along with a bibliography of all your sources and hand it. Write two papers like this during the semester. The purpose is to encourage you to track down more knowledge when you find something interesting. A key challenge in your papers is to explain how each topic is actually a topic in the field of developmental biology and not a different area of biology.

Chapter #2

not in text

Genes to focus on during Drosophila embryogenesis

BicoidHunchbackEven-skippedEngrailedAntennapedia

HedgehogWingless

Gurken

TollDorsalDecapentaplegicShort gastrulation

not in text: egg chamber

2.8 fly A/P axisgene hierarchy

Look at the summary paragraphs and associated flow chartsthroughout Chapter 2:

p. 66 Summary: Early Expression of Zygotic Genes

2.39 Hh/Wg4 nuclei

2.41 Hh/Wg feedback loop

Box 1E Wnt signal transduction

2.40 Hh signaling pathway

2.37 clonesin wing

2.21 D/V slice

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

Fig. 1.23

FT mRNA is transcribed in leaves and then the mRNAgoes through plasmodesmata on the way to cells in the shoot meristem where it is translated into a transcriptionfactor protein that regulates transcription of genes forflowering.

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