Course program
Fundamental concepts of development and its phylogeny: determination and differentiation; regulatory development and mosaic development; development stages; cloning
Model organisms: Overview of the genetic control of the development of mice, zebrafish, Xenopus and nematode Caenorabditis elegans; Drosophila melanogaster
Analysis of mutations that alter development patterns: maternal effect mutations; mutations gain of function and loss of function
Somatic genetic analysis: somatic recombination and compartments; induction of ginandromorphs and maps of fate.
Formation of the body axes: maternal genes; the anterior-posterior polarity; the dorsal-ventral polarity.
Construction of the body pattern: the genes of segmentation.
Segmental identity: homeotic genes. The evolution of homeotic genes. The syndromes related to homeotic changes in humans.
Cellular memory: the genes of the Polycomb group; the genes of the trithorax group. Syndromes and diseases related to alterations of memory genes in humans
Determination of sex: specification of the somatic line; germ line specification; specification of sexual behavior.
Dosage compensation: in Drosophila, in mammals and nematodes
Genetic control of eye development and evolution of the eye and photoreceptors.
The biological clock, the circadian rhythms and the coevolution of photoreceptors and circadian rhythms. Diseases related to circadian rhythms
Genetic control of the development of the heart and evolution of the cardiac tube.
Genetic control of the tubular organs: tube morphogenesis, signal systems, cell migration and organogenesis; evolution of the circulatory system.
The elements that are transposable in the evolution of development
the lessons are organized as:
- basic concepts of development: 2 hours
- genetic methodologies for the study of development: 12 hours
- genetic control of development: 18 hours
- evolutionary genetic control of development: 16 hours
Prerequisites
It is essential to have passed the exams of Genetics, Molecular Biology, Developmental Biology
In particular, it is necessary to know the basic concepts of Genetics, i.e. the laws of heredity, the concept of gene, gene and chromosomal mutations, the structure of DNA, the fundamental characteristics of the development of multicellular organisms, the general concepts of embryology
Books
Gilbert. Developmental Biology. Zanichelli for the part of the basic concepts of Developmental Biology
Pimpinelli. Genetica. Casa Editrice Ambrosiana
Alternatively any text of Genetics
Teaching mode
The 48 hours of lectures will be held in the classroom with the use of Powerpoint files on the program topics
Frequency
Class attendance is not mandatory.
Exam mode
The oral exam consists in exposing a topic to evaluate the communication skills of synthesis and analysis; in answering one or more questions chosen by the teacher to assess the level of depth of the study on the topics of the program (40%), to evaluate the student's ability to make connections (20%), organize a speech in a logical way (20%) and use appropriate language (20%). The questions refer to the topics presented during the lessons.
The evaluation is expressed in thirtieths (minimum mark 18/30, maximum mark 30/30 with honors).
To pass the exam with an assessment of 30/30 it is necessary to answer all the questions in an exact, logical, in-depth way and with language properties, demonstrating reasoning skills and being able to contextualize concepts and examples.
Bibliography
• Garcia-Bellido, A and JR. Merriam. 1969. Cell lineage of the imaginal discs of Drosophila melanogaster. Journal of experimental zoology 170: 61-76
• Johnston, D. and C. Nusslein-volhard. 1992. The origin of pattern and polarity in the Drosophila embryo. Cell 68: 201-219
• Nusslein-volhard, C. and E. Wieschaus. 1980. Mutations affecting segment, number and polarity in Drosophila. Nature 287: 795-801
• Schupbach, T. and E. Wieschaus. 1986. Maternal effect mutations altering the anterior-posterior pattern of the Drosophila embryo. Roux Arch. Dev. Biol. 195: 302-317
• Lewis, E. 1978. A gene complex controlling segmentation in Drosophila. Nature 276: 565-570
• Sanchez-Herrero E. et al. 1985. Genetic organization of Drosophila bhitorax complex. Nature 313: 108-113
• Baker, B. 1989. Sex and the single cell. Genetics 94: 383-423
• Baker, B. 1989. Sex in flies: the splice of life. Nature 340: 521-524
• Cline W.T. 1993. The Drosophila sex determination signal: how do flies count to two? Trends in Genetics 9: 385-390
• Gorman, M. and Baker, B.S. 1994. How flies make one equal to two: dosage compensation in Drosophila. Trends in Genetics 10: 376-380
• W.J. Gehring. (2005). New perspectives on eye development and the evolution of eyes and photoreceptors. Journal of Heredity 96:171-184
• K. Pappu and G. Mardon. (2004). Genetic control of retinal specification and determination in Drosophila. Int.J.Dev Biol. 48:913-924
• Z. Kozmik. (2005). Pax genes in eye development and evolution. Current Opinion in Gen. and Dev. 15:430-438
• D. Arendt. (2003). Evolution of eyes and photoreceptor cell types. Int.J.Dev.Biol. 47:563-571
• G. Halder, P. Callaerts and W. Gehring. (1995). Induction of ectopic eyes by targeted expression of the eyeless gene in Drosophila. Science 267:1788-1792
• W. Gehring and M. Rosbash. (2003). The coevolution of blue-light photoreception and circadian rhythms. J.Mol.Evol. 57:S286-S289
• M. Merrow, K. Spoelstra and T. Roenneberg. (2005). The circadian cycle: daily rhythms from behaviour to genes. Embo Reports 6:930-935
• D. Bell-Pedersen et al. (2005). Circadian rhythms from multiple oscillators: lessons from diverse organisms. Nature Genetics advance online
• J. Blau. (2001). The Drosophila circadian clock: what we know and what we don't know. Cell and Dev.Biol. 12:287-293
• K. Jagla, M. Bellard and M. Frasch. (2001). A cluster of Drosophila homeobox genes involved in mesoderm differentiation programs. Bioessays 23:125-133
• J. Chen and M. Fishman. (2000). Genetics of heart development. TIG 16:383-388
• P. Lo and M. Frasch. (2003). Establishing A-P polarity in the embryonic heart tube:a conserved function of Hox genes in Drosophila and vertebrates. TCM 13:182-187
• M. Simoes-Costa et al. (2005). The evolutionary origin of cardiac chambers. Dev.Biol. 277:1-15
• C. Ribeiro, V. Petit and M. Affolter. (2003). Signaling systems, guided cell migration and organogenesis: insights from genetic studies in Drosophila. Dev. Biol. 260:1-8
• R.Munoz-Chapuli et al. (2005). The origin of the endothelial cells: an evo-devo approach for the invertebrate/vertebrate transition of the circulatory system. Evol. Dev. 7:4 351-358
• W.J.Nelson. (2003). Tube morphogenesis: closure, but many openings remain. TCB 13:615-621
Lesson mode
The 48 hours of lectures will be held in the classroom with the use of Powerpoint files on the program topics