Lecture%2011 - BILD1 The Cell Problem Set 4 KEY posted...

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1 02/15/07 BILD1 - Lecture 11 1 BILD1 The Cell Prof. Lisa M. Boulanger 02/15/07 BILD1 - Lecture 11 2 Problem Set 4 KEY posted Saturday Review Session Saturday, 4:30-7:30, Solis 107 Midterm 2 in 1 WEEK! 02/15/07 BILD1 - Lecture 11 3 MIDTERM 1 IS THROUGH TODAY ONLY! Includes: PROBLEM SETS 3 and 4 CHAPTERS 6 & 7, 10-13 NOT SUPPLIMENTARY READINGS (THEY’RE SUPPLIMENTARY!) TUESDAY’S LECTURE (Mendelian Genetics) WILL NOT BE ON MIDTERM 2! REVIEW SESSION Saturday 4:30-7:30 in Solis 107 MIDTERM 2 WILL BE IN THIS ROOM EXAM POLICIES are on class website 02/15/07 BILD1 - Lecture 11 4 Highlights from previous lecture: 0.5 μm Separation of sister chromatids Centromeres Chromatid = 1 chromosome Ends = telomeres Two sister chromatids connected at the centromere Cell duplication for reproduction, development, growth, repair Prokaryotes: binary fission Æ 2 organisms eukaryotes: mitosis and cytokinesis Æ genetically identical daughter cells Somatic cells, 2n / germ cells, n chromosomes Sister chromatids Mitotic spindle (microtubules) Plants cell plate, animals cytokinesis 02/15/07 BILD1 - Lecture 11 5 Highlights from previous lecture: Interphase G1 S G2 Mitosis Prophase Prometaphase Metaphase Anaphase Telophase/Cytokinesis) Cell cycle control Cyclin, cdk, MPF, growth factors Substrate dependence, contact inhibition Cancer escapes cell cycle control 02/15/07 BILD1 - Lecture 11 6 THIS LECTURE: MEIOSIS!
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2 02/15/07 BILD1 - Lecture 11 7 Living organisms Are distinguished by their ability to reproduce their own kind Heredity Is the transmission of traits from one generation to the next Variation Shows that offspring differ somewhat in appearance from parents and siblings 02/15/07 BILD1 - Lecture 11 8 Genetics Is the scientific study of heredity and hereditary variation Offspring acquire genes from both parents by inheriting chromosomes 02/15/07 BILD1 - Lecture 11 9 Inheritance of Genes Genes Are the units of heredity Are segments of DNA Each gene in an organism’s DNA Has a specific locus on a certain chromosome We inherit One set of chromosomes from our mother and one set from our father 02/15/07 BILD1 - Lecture 11 10 Comparison of Asexual and Sexual Reproduction In asexual reproduction One parent produces genetically identical offspring by mitosis Parent Bud 0.5 mm 02/15/07 BILD1 - Lecture 11 11 In sexual reproduction Two parents give rise to offspring that have unique combinations of genes inherited from the two parents Fertilization and meiosis alternate in sexual life cycles A life cycle Is the generation-to-generation sequence of stages in the reproductive history of an organism 02/15/07 BILD1 - Lecture 11 12 Asexual reproduction produces Involves Mitosis or binary fission: Sexual reproduction 2 genetically distinct gametes 1 unique offspring (involves meiosis) Gametes: reproductive cell Haploid (n): 1 complete set of chromosomes Asexual vs. Sexual reproduction “CLONES” 1 2 identical progeny
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This note was uploaded on 03/26/2010 for the course BENG 110 taught by Professor Schmid-schoenbein during the Spring '08 term at UCSD.

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Lecture%2011 - BILD1 The Cell Problem Set 4 KEY posted...

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