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G ENETIC E NGINEERING IN A GRICULTURE : S ELECTIVE B REEDING B ASICS AND V OCABULARY Agriculture...
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Transcript of G ENETIC E NGINEERING IN A GRICULTURE : S ELECTIVE B REEDING B ASICS AND V OCABULARY Agriculture...
GENETIC ENGINEERING IN AGRICULTURE:
SELECTIVE BREEDING BASICS AND VOCABULARYAgriculture Biology
Objective: Today I will understand the vocabulary used in
genetic engineering, specifically selective breeding by completing my notes and “Ticket out the Door”.
Question of the Day: What two rabbits, if bred, would you expect to have
black-haired offspring?(Hint: you must have 2 letters in your answer)
AD
C
B
HOW DO WE GET SUCH DIFFERENCES IN
BREEDS?
VOCABULARY
Genetic Engineering
The deliberate modification of the characteristics of an organism by manipulating its genetic material
Genetic engineering is purposefully ____________ characteristics of plants or animals by controlling their ____________ material.
VOCABULARY
Selective Breeding
A method of breeding that allows only those organisms with desired characteristics to produce the next generation
If I wanted purple flowers, I would __________ purple-flowered plants to _______-_________ ________.
VOCABULARY
Hybridization*Also called crossbreeding
A breeding technique that involves crossing dissimilar individuals to bring together the best traits of both organisms
Hybridization is the ________ of both worlds.
X
Inbreeding*Also called purebreeding
The continued breeding of individuals with similar characteristics to maintain the desired characteristics of an organism
Inbreeding __________ characteristics the same from ______________ to generation.
VOCABULARY
13-1 NOTES1. Selective
Breedinga. Popcorn was one
of the first organisms humans improved for our own benefit.
o Corn as we know it was first grown as a crop at least 6000 years ago by Native Americans living in what is now Mexico.
HOW WE’VE USED SELECTION
b. Dogs- o Tiny Chihuahuas and Huge Great Daneso Labrador retrievers with short coats and
poodles with curly hair.c. Humans are always looking to make
animals that are better hunters, better retrievers or more capable of producing a quality product.
Selective Breeding- letting only those animals with desired characteristics produce the next generation.
The two most common methods of selective breeding are hybridization and inbreeding.
2. Hybridizationa. Crossing organisms that have
different traits to bring together the best of both organisms.
o Offspring made by such crosses are called hybrids.
o Often hardier than parents.o Results are new organisms that
have traits farmers need to make more food.
HOW IT ALL STARTEDa. Luther Burbank may have
been the greatest selective breeder of all time.
o Developed more than 800 kinds of plants
o Burbank used Hybridization.o Many of Burbank’s hybrid
crosses mixed the disease resistance of one plant with the food-making ability of another.
3. Inbreedinga. Continued breeding of
individuals with similar characteristics.
a. Many breeds of dogsb. Inbreeding helps keep the
characteristics that make each breed unique and helps make sure that those characteristics are preserved.
c. Inbred organisms are genetically very similar and can increase the probability that organisms may inherit genetic disorders.
Example- inherited hip problems are common to many breeds of dogs.
Key Question: Answer on your notes using complete sentences
What is selective breeding used for?
TICKET OUT THE DOOR1. Crossing individuals with different traits to bring together their best characteristics is called
a. domesticationb. inbreedingc. hybridizationd. polyploidy
2. Crossing individual with similar characteristics so that those characteristics will appear in their offspring is called
a. inbreedingb. hybridizationc. recombinationd. polyploidy
3. Taking advantage of naturally occurring variation in organism to pass wanted traits on to future generations is called
a. selective breedingb. forensicsc. gene therapyd. mutation