1 / 38

First Five

First Five. Complete the c hart above. Give an example for each term. Answers to First Five. Announcements. Nutrition Quiz Retakes: Correct your quiz Retakes will be available beginning Monday, April 14 Class meetings this week: Maroon: Monday & Friday Gold: Tuesday & Thursday

boyd
Download Presentation

First Five

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. First Five Complete the chart above. Give an example for each term.

  2. Answers to First Five

  3. Announcements • Nutrition Quiz Retakes: • Correct your quiz • Retakes will be available beginning Monday, April 14 • Class meetings this week: • Maroon: Monday & Friday • Gold: Tuesday & Thursday • If you have any Coursework, turn it in TODAY

  4. Topics Diploid vs. Haploid Mitosis vs. Meiosis Asexual vs. sexual reproduction

  5. 2 Different types of cells BODY CELLS (Somatic) SEX CELLS (Gametes) Examples: sperm and egg cells HAPLOID: Only have 1 copy of each chromosome 23 in total • DIPLOID: Have 2 copies of each chromosome: one from mother and one from father • 46 total in each body cell

  6. 2 Different types of Cell Division Body Cells (Somatic) Sex Cells (Gametes) Made by MEIOSIS • Made by MITOSIS

  7. Mitosis • Creates two genetically identical daughter cells • Chromosome number is maintained by the exact duplicationof chromosomes.

  8. Inheritance - Meiosis • Half of the genetic information in a cell is passed on to new cells • When the cells are preparing for sexual reproduction. • The new cells are called gametes. • Two types of gametes: egg and sperm • Meiosis results in genetic variation

  9. Meiosis • The original cell is diploid and the daughter cells are haploid. 1 diploid cell 4 unique haploid cells

  10. MITOSIS OR MEIOSIS? As we go through the following, identify whether the statement is describing mitosis or meiosis and write in the correct column

  11. MITOSIS OR MEIOSIS? • Produces 2 cells • Occurs in somatic (body cells) • Has 2 separate divisions • In humans, produces cellswith 46 chromosomes

  12. MITOSIS OR MEIOSIS? • Produces 2 cells - Mitosis • Occurs in somatic (body cells) - Mitosis • Has 2 separate divisions - Meiosis • In humans, produces cells with 46 chromosomes - Mitosis

  13. MITOSIS OR MEIOSIS? • New cells are different from each other • Produces new diploid cells • Cell divides only once • Produces 4 cells

  14. MITOSIS OR MEIOSIS? • New cells are different from each other - Meiosis • Produces new diploid cells - Mitosis • Cell divides only once - Mitosis • Produces 4 cells - Meiosis

  15. MITOSIS OR MEIOSIS? • Produces cells that are identical to each other • Produces haploid cells • Occurs in sex cells (gametes) • In humans, produces cells with 23 chromosomes

  16. MITOSIS OR MEIOSIS? • Produces cells that are identical to each other - Mitosis • Produces haploid cells - Meiosis • Occurs in sex cells (gametes) - Meiosis • In humans, produces cells with 23 chromosomes - Meiosis

  17. Quick Review • What type of cells does mitosis produce? How many chromosomes are in these cells? • 2) What type of cells does meiosis produce? How many chromosomes are in these cells?

  18. Cambridge Practice Question: Fill-in-the blanks • Choose words from the list to complete each of the spaces in the paragraph. Each word may be used once only and some words are not used all. Allele diploid dominant gene haploid sexual heterozygous homozygous meiosis mitosis recessive

  19. Cambridge Practice Question: Fill-in-the blanks Allele diploid dominant gene haploid sexual heterozygous homozygous meiosis mitosis recessive In humans there is a condition known as cystic fibrosis. This is controlled by a single _1_which has two forms. One form causes cystic fibrosis while the other does not. Gametes are formed by _2_ which produces cells with only one copy of each chromosome, which means that they are _3_. When two humans reproduce, their gametes fuse at fertilization to form a _4_zygote. This is an example of _5_ reproduction.

  20. Cambridge Practice Question: Fill-in-the blanks Allele diploid dominant gene haploid sexual heterozygous homozygous meiosis mitosis recessive Neither of the two humans has cystic fibrosis but one of their three children does have the condition. This means that cystic fibrosis is controlled by a _6_allele and that each of the parents is _7_.

  21. Mitosis and Meiosis are Related to Reproduction Mitosis Meiosis Sexual reproduction TWO parents produce unique offspring • Asexual reproduction • One parent makes offspring that are genetically identical to itself and each other • Processes: Cloning, “budding” (e.g. in yeast), binary fission (e.g. in bacteria)

  22. Asexual Reproduction • ONE parent produces genetically identical offspring. • There are four main types of asexual reproduction: • Binary Fission • Budding • Vegetative Propagation • Regeneration http://az.pbslearningmedia.org/resource/tdc02.sci.life.repro.asexual/asexual-reproducers/

  23. Examples of Asexual Reproduction Binary fission

  24. Examples of Asexual Reproduction Budding

  25. Examples of Asexual Reproduction Vegetative propagation

  26. Examples of Asexual Reproduction Regeneration

  27. Benefits of Asexual Reproduction • Rapid population growth • Requires less energy to reproduce • All organisms are capable of reproduction (not just the females of the species) • One organism can make a whole population • Less likely to become extinct • Each offspring is a genetic copy of the parent

  28. Disadvantages of Asexual Reproduction • The primary disadvantage of asexual reproduction is: THERE IS NO GENETIC DIVERSITY! • This means that a population of genetically identical organisms is more susceptible to disease and can’t adapt easily to a changing environment.

  29. Sexual Reproduction • Sexual reproduction requires two organisms. • Happens when the two gametes (sex cells) fuse together to create a new and genetically different offspring.

  30. Stop and Jot • How is Meiosis related to Sexual Reproduction?

  31. Advantages of Sexual Reproduction • Creates more genetic diversity in the offspring. • More adaptability • More variation • Greater chance of mutation • Greater chance of survivability when faced with environmental change

  32. Disadvantages of Sexual Reproduction • It requires two individuals with opposing gametes (sex cells). • Organisms must use a lot of energy nourishing and growing a new baby organism.

  33. Comparing Asexual and Sexual Reproduction One parent 2 parents Different from parents but still similar Identical to parent Combined DNA of 2 parents Same as parent

  34. Asexual DNA DNA Sexual DNA DNA DNA + Sperm Egg Zygote

  35. Asexual All offspring identical – no variation DNA DNA Sexual DNA DNA DNA + DNA or DNA DNA All offspring different – considerable variation or DNA DNA

  36. Whiteboard Races Create a Venn Diagram on a large whiteboard Fill in as many similarities or differences as you can After 3 minutes, groups will rotate and add on to each new group’s Sexual Asexual

  37. Cambridge Practice Problems • This is due on FRIDAY (Maroon) or THURSDAY (Gold)

  38. Classwork: Reproductive Strategies • You will be assigned a group number, 1-6 • On a computer, go to the class weebly • You and your group will read about two organisms: one that reproduces sexually and the other asexually • Record information in your table and be prepared to share with the class

More Related