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Test 4, Objective 6.0 & Dihybrid Crosses Study Guide
1. What is a dihybrid cross?
2. Be able to create gametes for homozygous or heterozygous parents in a dihybrid cross.
3. Define host.
4. Define prey.
5. Define predator.
6. Define predation.
7. Define competition.
8. Define mutualism.
9. Define species.
10. What are variations in species?
11. How are new species made?
12. Define extinct.
13. What are homologous structures?
14. What is evolution?
15. What did Darwin observe about the finches of the Galapagos Islands?
16. What is an adaptation?
17. Define natural selection.
18. Define overproduction.
19. How do helpful variations accumulate among surviving members of the species?
20. What was special about the organisms Darwin observed on Galapagos Islands?
21. Define ecology.
22. Give examples of the 3 types of symbiotic relationships: mutualism, commensalism, &
parasitism.
23. Does isolation cause more or less species to be created?
24. How did Darwin say species evolve—fast or slow?
1. cross that involves 2 traits
2. practice using 3rd guinea pig cross
3. organism that has another organism living on/in it
4. organism that is the food source for a predator
5. organism that relies on other organisms for food
6. the act of killing/eating another animal for food
7. struggle b/w organisms to survive in a habitat w/limited resources
8. symbiotic relationship b/w 2 organisms in which both benefit
9. group of sim organism that can mate & produce fertile offspring
10. differences b/w members of same species
11. Example: a group gets separated physically, climatically, or geographically from the rest of
the group
12.all organisms of a species are dead
13. sim structures that a related species inherited from a common ancestor
14. gradual change over time
15. beaks were adapted related to food they ate
16. trait that helps an organism survive & reproduce
17. process by which individuals better adapted survive & reproduce
18. producing more offspring than can survive
19. natural selection 20. changed over time
21. study of how things interact w/each other & environment
22. mutualism: cow & egret; commensalism: lichen; clown fish & anemone; parasitism:
heartworms, mistletoe
23. more
24. slow