sexual reproduction. my goals today i will learn how living organisms reproduce and pass traits to...
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SexualReproduction
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My GoalsToday I will learn how living
organisms reproduce and pass traits to their
offspring.
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What is heredity?
Heredity is the passing on of traits from one generation to the next.
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What are the two modes of reproduction?
Sexual Reproduction
and
Asexual Reproduction
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How do eukaryotic cells reproduce?
Sexually
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How do prokaryotic cells reproduce?
Asexually
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Sexual or Asexual Reproduction?
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How diverse are humans?
Create a group with students that are the same height as you.
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1. If these students had the same amount of time to grow, why are
they different heights?
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Sexual reproduction creates diverse offspring, or offspring containing a combination of DNA from
both parents.
Sexual Reproduction
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Produces a special cell with one of each pair of genes – called an egg cell.
Female Organism
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Produces a special cell with one of each pair of genes.
- sperm cell in animals - pollen in plants.
Male Organism
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In animals, sperm is made in the testes of males.
Where is sperm made?
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In plants, pollen is made in the stamen. BrainPOP | Science | Learn about Pollination
Where is pollen made?
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Sexual Reproduction in Animals
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During fertilization, egg and sperm join together. Once the egg is fertilized, it is called a zygote and will develop into a new organism.
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Asexual Reproduction• The production of offspring by a single parent,
without the union of a sperm cell and an egg cell.
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Asexual Reproduction
• The offspring is getting genes from only one parent so they are genetically identical to the parent.
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Types of Asexual Reproduction
• Budding = a new organism grows from an existing organism and then breaks off.
• Example = hydra
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Types of Asexual Reproduction• Fission = an organism splits in two to create
two new organisms.• Examples = prokaryotes
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Types of Asexual Reproduction• Vegetative Propagation = smaller plants begin
to grow off of an adult plant.• Examples: grasses growing rhizomes and
stolons
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Pros & Cons to Asexual Reproduction• Pros– Don’t have to waste energy finding a mate– Can easily produce many offspring
• Cons– All organisms are genetically identical– They all have the same weaknesses
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What’s happening in these videos?
http://www.bing.com/videos/search?q=cell+mitosis&view=detail&mid=350203EF0FC4290C11ED350203EF0FC4290C11ED&first=41&FORM=NVPFVR
https://www.youtube.com/watch?v=9MnQxiSJZ4Q
•Discovery Ed: Meiosis http://app.discoveryeducation.com/search?Ntt=heredity
•Discovery Ed: Patterns of Inheritance http://app.discoveryeducation.com/search?Ntt=heredity