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General Biology II

by: Hadley Pollich

General Biology II BI 102

Hadley Pollich
Central Oregon Community College
GPA 3.7


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Class Notes
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This 29 page Class Notes was uploaded by Hadley Pollich on Monday October 5, 2015. The Class Notes belongs to BI 102 at Central Oregon Community College taught by Staff in Fall. Since its upload, it has received 21 views. For similar materials see /class/218969/bi-102-central-oregon-community-college in Biology at Central Oregon Community College.

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Date Created: 10/05/15
Sexual Selection Asexual Reproduction fissiondividing into two individuals Asexual Reproduction budding growth of a new individual clone aggregation of some of the body cells enclosed capsule I do at 3 ag l taunt 3191 4 4 I am e opfn Hon 9555 6 l 7 l gemmules Asexual Reproduction Asexual Reproduction 5 fragmentationregenerationindividual broken into pieces reforms missing body parts Asexual Reproduction parthenogenesis unfertilized egg develops into an individual eg whiptail lizard Daphnia Reproduction Daphnia produce d39xploid eggs without sex Daphnia Reproduction E a Q B e E 5 1 u n 39u 5 E D 40 60 Percentage of females reproducing sexuauy Daphnia Reproduction Water Food Sexual quality concentration broods Clean Cvowdad C ean Cvowdeu C aan Crowded mean Cowdsd j l 7 Forming Sex Cells Spennatogenesis a Spermatogonium May divide by mitosis to form more spermatogonia Primary spermatocyte Meiosis l Meiosis ll 3 Spermatids l l l All Secondary spermatocyte Mature sperm cells Oogenesis Oogonium l so Meiosis Ix Secondary oocyle polar body Meiosis II A Ovum polar body I V Primary oocyte Mature egg cell Frequency 11 Gamete Size Size Let s say that the graph on the left is the distribution of gamete sizes 11 Frequency 12 Gamete Size Size If larger gametes produce larger zygotes and these have better survival 12 Frequency 13 Gamete Size Size Then it is possible for smaller gametes to evolve that only fuse with large gametes 13 Frequency 14 Gamete Size M NA Size And two sexes evolve one that produces few large gametes eggs and one that produces many small gametes sperm 14 15 Sperm Structure Plasma membrane Middle piece Meek Head Mitochondrion spiral shape Acrosome 16 Egg Structure Enclosed within ovarian follicle until release Covered by jelly coat and vitelline layer with receptor proteins sperm identified this way Degenerating START Primary oocyte corpus Iutqllm Within fomcie u m b u i 5 f 1 39 nourish zygote 23 i39 V 39 l Corpus luteum Growing follicles 7 l 39 Mature follicle Secondary oocyte Ovary Ovu39atmquot Ruptured follicle 17 Example of Sexual Selection Example of Sexual Selection Example of Sexual Selection Example of Sexual Selection d 21 Example of Sexual Selection Can Sex Drive Evolution 22 Sexual Selection example Pronghorn antelope 23 Figure 5 25 Traits Associated with Female Choice E a n m 2 m E u m E a g m a Percentage females horn Elephant Seal Data 0 14 11720 Females 2 3 4 5 6 Number of a spring weaned 26 Pipefish Experiments Mating success histograms For males black bars and females gray bars in thethree sex ratio treatments 39 Fimm E39ICirli r 7 g r Emu 5quot km a A lfIIIMEMZHI Numm nl Hutj Jones A B at al Integr Comp Biol 2ED545ET48E4 do39 1 39v39 m 3925 1 215 tray 553 lemales y 256x 04 males 4x 240 h UCCESS y 222x 38 144X 164 as 2 U I 1 9 cu cu EC to m a o o s a gt 5 o s 13 o L o a CC 1 2x 29 45x 277 Integrative and Comparative Bia ogy 29 Mating Success and Body Size


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