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Biology

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Investigating the effect of nicotine on the heart rate of Daphnia

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SBI4U Shonara Gibson December 7, 2010 Partner: Helen Picard Investigating the Effect of Nicotine on the Heart Rate of Daphnia Results: Table 1: Heart Rate of Daphnia with Various Amounts of Nicotine Present in Surroundings Amount of Nicotine in Surroundings (drops) Heart Rate (beats per minute) Average Variation Daphnia #1 Daphnia #2 No nicotine 384 372 378 10% of 378 = 38 Variation 6 6 6 1 drop 402 414 408 10% of 408 = 41 Variation 6 6 6 2 drops 420 420 420 10% of 420 = 42 Variation 0 0 0 3 drops 510 480 495 10% of 495 = 50 Variation 15 15 15 Figure 1: Graph showing Heart Rates of Daphnia with Increasing amounts of Nicotine Present in Surroundings Sample Calculations:

Fill-in-the-Blank Chart Study Guide Ch 4&5

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Mendelian Genetics

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Mendelian Genetics Two Hypotheses of Heredity Blending Hypothesis ? genetic material from both parents ?mixes? like red and blue make green. Particulate Hypothesis ? parents pass on distinct units (genes) that retain their separate identity in an undiluted form This is the hypothesis that is accepted today Gregor Mendel developed his theory in the mid 1800?s before chromosomes had been viewed under the microscope He was a Monk who studied math and crossing pea plants to study inheritance Terms for Studying Genetics Character ? a heritable feature that varies among individuals, such as flower color. Trait ? each variant for a character, such as white or purple flowers Hybridization ? crossing of true-breeding varieties

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