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3/11/14 117 th Day of School

3/11/14 117 th Day of School. Learning goal (7.L. 2) : (7.L.2) I be able to explain how traits are acquired and/or inherited in patterns described by Gregor Mendel. Due Today: Meiosis diagram Evening Assignment: Finish vocabulary flashcards or chart; Study for Test.

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3/11/14 117 th Day of School

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  1. 3/11/14117th Day of School Learning goal (7.L.2): (7.L.2)I be able to explain how traits are acquired and/or inherited in patterns described by Gregor Mendel. Due Today:Meiosis diagram Evening Assignment: Finish vocabulary flashcards or chart; Study for Test

  2. What did you discover from Monday’s reading passages? On a slip of paper write your name and answer the following question: Do Now Why does sexual reproduction require meiosis?

  3. On a piece of paper write your name and create 5 questions for tomorrow’s test. Be sure to include your answers on the back. Your questions MUST cover these genetic topics: traits, Mendel, Punnett squares, pedigrees, and meiosis. When finished, exchange your questions with your neighbor. Study your vocabulary before the test review begins. Student-Generated Test Questions

  4. Competition between the boys and the girls to see who has the most knowledge about genetics! One boy and one girl will compete to answer a student generated question. You may not participate more than 2 times. Everyone has to take a turn. And the winner is… …everyone if you pay attention! Test Review

  5. Meiosis is the process by which the number of chromosomes is reduced by half to form gametes (reproductive cells: sperm & egg in humans and animals or pollen & ovule in plants). This Punnett square shows how alleles separate when sex cells form during meiosis. It also shows the possible allele combinations that can result after fertilization occurs. (READ pages C98-100 in the green textbook). Meiosis and Punnett Squares

  6. Fertilization is the process that takes place when a male gamete (sperm) and a female gamete (egg) combine to form one new cell. In humans, an egg cell with 23 chromosomes joins a sperm cell with 23 chromosomes to form a new 2n cell with 46 chromosomes. (READ pages C117-119 yellow book). Fertilization Why does sexual reproduction require meiosis?

  7. As you watch and listen, write in your science notebook some sources of genetic variation (i.e. things that lead to differences in traits and individuals). Source of Genetic Variation: Mutation & Reproduction (Recombination) http://learn.genetics.utah.edu/content/variation/sources/

  8. http://www.biotopics.co.uk/genes1/asexual_and_sexual_reproduction.htmlhttp://www.biotopics.co.uk/genes1/asexual_and_sexual_reproduction.html In your science notebook, READ and take NOTES on the differences between asexual vs. sexual reproduction. Think about how genes (traits) are passed from parent to offspring for each. Also note some examples of each type. Which type of reproduction leads to more genetic variation and why? Genetic Variation: Sexual vs. Asexual Reproduction

  9. McDougall pgs. C102-103 Key Terms Homologous Chromosomes (from father & mother) Sister chromatids (replicated chromosomes) http://www.phschool.com/science/biology_place/labbench/lab3/homologs.html

  10. http://www.phschool.com/science/biology_place/labbench/lab3/homologs.htmlhttp://www.phschool.com/science/biology_place/labbench/lab3/homologs.html http://kids.britannica.com/comptons/art-90111/A-homologous-pair-of-chromosomes-consists-of-one-chromosome-from Homologous Chromosomes (from father & mother) Sister chromatids (replicated chromosomes) Meiosis: process of cell division where DNA is replicated (copied) then separated and divided twice to produce new cells called gametes (reproductive cells) Key Terms

  11. Read McDougall pages C120-121 about Meiosis. Then watch the Meiosis animation detailed on the next slide. Use the two resources to create a labeled diagram showing and describing what happens to the chromosomes in each stage of meiosis. Meiosis

  12. Watch the Meiosis (Narrated) animation and take notes on what happens to the DNA (genes) and chromosomes during each stage of meiosis. Turn on show text to help you take notes. http://www.sumanasinc.com/webcontent/animations/content/meiosis.html Meiosis

  13. On the BACK On the FRONT Definition/characteristics: A trait or characteristic that is developed or learned through life. Traits you aren’t born with. Traits GENERALLY not controlled by DNA. Examples: Walking, speaking English, dyed hair, pierced ears, Glasses, skin cancer? Acquired Trait Genotypes Phenotype Dominant Recessive Gregor Mendel Pea Plants Genetic VariationFertilization Gametes Asexual Reproduction Acquired trait Inherited trait Sexual reproduction Heredity DNA Chromosome Gene Allele Meiosis & Stages Punnett Square Monohybrid cross Homozygous(Purebred) Heterozygous (Hybrid) Mutation Genetic Disorder Sickle Cell Anemia Hemoglobin Pedigree Genetics Vocabulary chart or flashcards due 3/12/14

  14. Choose ONE of the following projects to do as a summative MAJOR assessment for the Genetics Unit. Do detailed, quality work to get full credit. Genetics Projects – due 3/21/14

  15. This evening… Study for Test • Traits • Gregor Mendel • Punnett squares • Pedigrees • Meiosis Evening Assignment

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