ISB 201 1st Edition Lecture 8Outline of Last Lecture I. R and K SelectionII. Natural SelectionOutline of Current Lecture III. BacteriaIV. Sexual SelectionCurrent LectureIII. Bacteria reproduce A Sexually and Sexually (where genetic variability takes place)A. Conjugationexchange DNA (sexual reproduction) with sex pilus1. High biotic potential- higher ability to adapt2. Double in population every 20 min3. We will never kill off bacteria because of high reproductive rateIV. Sexual Selection traits sole function is help maximize reproductive success A. Female choice traits purpose to attract females; recognition1. Widow bird tails- female birds often chose males based on elaborate ornamentation and or behaviorsa. Not a beneficial mutation for survival in environment b. Tails get longer and longer- directional selection2. Lion’s mane- characteristic of good genes, health and power B. Male competition fighting advantages to win over a female; territorial 1. Elephant seals- compete for a harem of seals; beneficial mutation to be larger and store more body fat to last through mating seasonC. How can you attract females without ornamentation 1. Behavior determined by mutations2. Male bower bird- builds extravagant and organized nests a. Shows dedication, resourcefulness, protectionb. Shows good genes that females want to pass on3. Dancing birds of paradise4. Stalk-eyed flies inflate eye stalksa. Longer eye width preferred by females produced by longer eye with genesb. Disruptive selection5. MuskoxThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.a. Live in a very cold climate- 2 layer coat that is most durable fiber, waterproof, and antibiotic b. Circle the wagonsc. Male competition- big boss on horns used to butt heads with other males of the same
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