tuesday january 26 th day 2 science starters sheet 1. please have these items on your desk. agenda3...
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HUMAN INTERVENTIONTRANSCRIPT
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Tuesday January 26 th Day 2
ScienceStarters Sheet
1. Please have theseItems on your desk.
Agenda3 Workssheets
Science starter:
1.Which organelle is the control center of the cell?
2.What does the cell theory state?
3.What’s the function of the mitochondria?
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To do list . . . . .
• Correct the three worksheets.
• Finish mind map. Share with your shoulder partner.
• Finish weird genetics power point.
• Jeopardy game.
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HUMAN INTERVENTION
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SELECTIVE BREEDING
The selection of certain seeds or animals for
reproduction in order to influence the traits inherited
by the next generation.
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SELECTIVE BREEDING
• The Liger is the result of breeding a female Tiger to a male Lion.
• The liger has both stripes and spots. The stripes are inherited from its tiger parent and the spots from the lion parent.
• On their hind legs, ligers stand approximately 12 feet tall. At most, ligers may weigh up to 1,000 pounds.
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The Cama is the result of breeding a Llama to a Camel.
Parents in background of picture.
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The Zebroid is the result of breeding
a female Horse and a male Zebra.
The Zedonk / Zonkey is the result of breeding a female Donkey and
male Zebra.
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The Mule is the result of breeding a female horse(mare) to a male donkey (jack). The
mule is superior to the horse in strength,endurance, intelligence and disease resistance.
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Maroon & Red Bluebonnets
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GENETIC ENGINEERING
The selective, deliberate change of genes (genetic material) by man.
The technique of removing, modifying or adding genes to a
DNA molecule in order to change the information it contains.
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Bright face of genetically modified corn plant: pest-infected non-GM (left) and pest-free GM plant (right)
planted side-by-side in a field trial. (photo: Dr. Yu Jialin, China Agricultural University)
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French genetic researchers created Alba for artist Eduardo Kac. Thanks to genes borrowed from a jellyfish, the albino rabbit glows green when placed under special lighting. In regular light, Alba appears like any other furry white rabbit. But place her under a black light, and her eyes, whiskers and fur glow a otherworldly green.
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"Glow in the dark" fish. these genetically modified fish were developed by a Taiwanese aquatic firm, Taikong Group. They are planning to reproduce these fish in numbers and sell them for pets.
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Scientists in the agriculture department of the Hebrew University inRehovot have genetically engineered a chicken that has no feathers.
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Selective Breeding
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Labradoodle
• Look at the following dogs - crossing a Poodle and a Labrador results in a ‘Labradoodle’
• What features has the Labradoodle inherited from the Labrador?
• What features has the Labradoodle inherited from the Poodle?
Poodle Labrador Labradoodle
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Labradoodle
• The Labradoodle is large (like the Labrador), has a fluffy coat (like the Poodle) which sheds much less than a Labrador’s coat. They are also generally well tempered and good swimmers (like both its parents breeds).
• So the Labradoodle has favorable characteristics from both of its parents breeds
Poodle Labrador Labradoodle
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Species gradually evolve by a process of natural selection
Individuals in a species show a wide variation (due to gene differences)
Individuals with inherited features best suited to their environment are most likely to survive and reproduce: passing on their genetic information to their offspring
Over time, a species can change its appearance, and may even become a new species, unable to reproduce successfully with individuals of the original species
Individuals with the most favorable genes for the environment they live in are selected over time: this is natural selection
Natural Selection
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Selective breeding is a process used to produce different breeds of animals or varieties of plants that have useful characteristics
Using selective breeding you can produce a specific offspring with useful characteristics of both parents
Farmers can choose individual cows to mate in order to produce a generation of cows that will yield more milk
Apple growers want to produce a type of apple that is tasty and resistant to disease. This can be done by crossing a variety of apple known for taste with another variety that shows strong resistance to disease
Selective Breeding
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Summary
The key is to identify the feature you want, and only breed from the individuals that have that feature.
Examples of what selective breeding can produce include: -
• Hens that lay big eggs of a particular color
• Cattle that produce lots of meat• Tomato plants that produce lots
of tomatoes• Crops that are resistant to
certain plant diseases