how do we make our world “better?” biology standard 5c and d modifying our living world with...
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How do We Make Our World “better?”
Biology Standard 5c and d
Modifying our Living World with DNA!
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• AKA Mating• By choosing the “best” individuals of a species and breeding them, you can get
the “best” offspring.
Breeding
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• Allowing those orgs w/ desired characteristics (DNA) to produce next gen.
• Based on phenotype (what animal looks like)
• Genotype (DNA) codes for phenotype.
Selective Breeding
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Selective Breeding: Super Cow!
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Selective Breeding
Pro
gre
ssio
n o
f C
orn
ove
r ti
me
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Hybridization
• Crossing dissimilar individs to bring together best of both orgs.
• Can make orgs disease resistant; sterile!
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Hybridization
Liger
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Hybridization: Zorse
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Hybridization: Zedonk
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Hybridization: Prizzly Bear
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Hybridization: Tomacco
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Hybridization: Wolf/Dog
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Inbreeding
• Continued breeding of individs with
similar characteristics.
• Risky! Genetic defects!
• Too many recessive alleles
(not dominant traits) Hemophilia: The Royal
Disease: Queen Victoria
X linked Hemophilia
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Royal Pedigree
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No Sex with Your Siblings!
• Inbreeding is dangerous b/c when 2 individs mate that are genetically similar, recessive disorders are kept inside the family and are
passed to offspring.
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Cat
alin
a B
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