1. Mind Stretcher- 3/26/18
A change in the DNA sequence that can be harmful, helpful or make no difference
Ribosome
Messenger RNA
Mutation
Transfer RNA

2. Selective Breeding S7L3 c.
Ask questions to gather and synthesize information about the ways humans influence the inheritance of desired traits in organisms through selective breeding.

3. KNOW: Selective Breeding
choosing two organisms of the same species and mating them with the hope of getting the best qualities of each parent to show up in the offspring.
Also called “Artificial Selection”

4. Selective Breeding: Details
Used mostly for dogs, cats, other pets, cattle, and crops.
REMEMBER: Selective breeding crosses (mates) organisms with desirable traits to produce offspring that have the traits from both parents!

5. Selective Breeding- https://youtu.be/W_CnR0Ak604

6. Selective Breeding Example A
“Robust” means STRONG & HEALTHY!
Tough wild boars mated with friendly meaty pigs give you robust & meaty pigs for your farm.
Tough Boar + Meaty Pig = (strong, tough, meaty pig)

7. Selective Breeding Example B
Santa Gertrudis cattle
(cross of 2 breeds)
RESULT = good beef and resistant to heat!
Brahman cattle: Good resistance to heat, but poor beef.
English shorthorn cattle: Good beef but poor heat resistance.
hot weather cow + beefy cow = (beefy/hot weather cow)

8. Selective Breeding: Example C
Ancient corn from Peru
(~4000 yrs old)
Choosing only the best corn plants to use for future seeds = better crops over time.

9. Selective Breeding Example D=
little red + big green = BIG RED TOMATO

10. Advantages of Selective Breeding
Might get improved organisms
Don’t need any special tools or lab
Can be performed easily by farmers & breeders
You “SELECT” the traits you want to “BREED”

11. Disadvantages of Selective Breeding
Undesirable traits from both parents may appear in the offspring
Disease can accumulate in the population
Deaf Dalmatians, boxers with heart disease, labs with hip problems, etc.
Genetic disorders become more prominent due to Inbreeding (breeding of closely related family members to increase a particular trait)

12. Selective Breeding: Biology for All https://youtu.be/fHS-OY9XDZc

13. Bald Chickens!? https://youtu.be/W4u8xMnr15Q

14. REVIEW Selective Breeding Genetic Engineering
Process has been around for thousands of years
Combines the best traits of two organisms
Results in organisms that have the desirable traits of their parents
Genetic Engineering
Keep this side blank for now…we will complete it tomorrow!

15. Selectively Breeding Cows
You may one breed each cow only one time
You must say which trait you are hoping to pass on for each cow.
EX: I chose Alma for her resistance to weather and I chose the bull, Brutus, for his strong muscles.

16. HW: STUDY mitosis/meiosis & selective breeding (test Thurs)
Closing- Share Aloud
After reviewing your notes from Friday & today, think of two examples or facts about Selective Breeding…
Be ready to share them aloud if called upon
HW: STUDY mitosis/meiosis & selective breeding (test Thurs)