Reproductive Isolation and Speciation Guided Viewing
1. What happened with Diane Dodd and the fruit flies? How did she create reproductive isolation?
- Diane Dodd put separated a specie of fruit flies into two and feed each group different things. After each generation that were once a specie of flies had become two different species.
2. What is the definition a species?
- A group of individuals that can interbreed and create fertile offspring
3. What are the two main types of barriers in reproductive isolation?
- Physical (Geologic) and pre/post-zygotic
4. What is gene flow? What is reproductive isolation?
- The genes within a population not being mixed. Reproductive isolation is a population not being able to reproduce with rest of the population due to barriers
5. What is geographic isolation? (Give an example).
- When there is an isolation in the population due to where they exist. Ulmis Pulima which cannot breed entirely due from by separated by the Great Wall of China
6. What is allopatric speciation? (give an example)
- When you have two groups that have different lands. An example is the meta-lark
7. What is sympatric speciation? (give an example)
- When they live in the same land. An example is when a plant can get too many chromosomes preventing further breeding
8. What is peripatric/parapatric speciation? (give an example)
- When one group of a population moves to another area and starts to breed. An example is the "Forest" elephant which is different from the typical African elephant
9. What are pre-zygotic barriers? Name the types of pre-zygotic barriers (explain each). (Temporal,
Mechanical, Behavioral)
- Pre-zygotic barriers are barriers formed before a zygote is formed
- Temporal: Breeding species that breed at different times of the year (Toads)
- Mechanical: When reproductive organs of species cannot reach one another (Snails)
- Behavioral: When the behaviors of species or mating calls are different (Meta-lark)
10. What are post-zygotic barriers? Name the types of post-zygotic barriers- give examples. (Zygote Mortality, Hybrid Sterility)
- Post-zygotic barriers is when the sperm and egg mix to form a zygote but the zygote may die
- Zygote Mortality: When the sperm and egg can mix but the zygote will die instantly (Coral)
- Hybrid Sterility: When two species mixed two create a whole new species. The offspring will survive but cannot reproduce (Horse+Donkey=Mule)
11. What is polyploidy? What happens? Where is this common?
- Polyploidy is an example of very fast speciation. There is a mistake in the chromosome number. This is incredibly in plants
12. What is the theory of Punctuated Equilibrium?
- Change very fast over time rather than gradually.
- Diane Dodd put separated a specie of fruit flies into two and feed each group different things. After each generation that were once a specie of flies had become two different species.
2. What is the definition a species?
- A group of individuals that can interbreed and create fertile offspring
3. What are the two main types of barriers in reproductive isolation?
- Physical (Geologic) and pre/post-zygotic
4. What is gene flow? What is reproductive isolation?
- The genes within a population not being mixed. Reproductive isolation is a population not being able to reproduce with rest of the population due to barriers
5. What is geographic isolation? (Give an example).
- When there is an isolation in the population due to where they exist. Ulmis Pulima which cannot breed entirely due from by separated by the Great Wall of China
6. What is allopatric speciation? (give an example)
- When you have two groups that have different lands. An example is the meta-lark
7. What is sympatric speciation? (give an example)
- When they live in the same land. An example is when a plant can get too many chromosomes preventing further breeding
8. What is peripatric/parapatric speciation? (give an example)
- When one group of a population moves to another area and starts to breed. An example is the "Forest" elephant which is different from the typical African elephant
9. What are pre-zygotic barriers? Name the types of pre-zygotic barriers (explain each). (Temporal,
Mechanical, Behavioral)
- Pre-zygotic barriers are barriers formed before a zygote is formed
- Temporal: Breeding species that breed at different times of the year (Toads)
- Mechanical: When reproductive organs of species cannot reach one another (Snails)
- Behavioral: When the behaviors of species or mating calls are different (Meta-lark)
10. What are post-zygotic barriers? Name the types of post-zygotic barriers- give examples. (Zygote Mortality, Hybrid Sterility)
- Post-zygotic barriers is when the sperm and egg mix to form a zygote but the zygote may die
- Zygote Mortality: When the sperm and egg can mix but the zygote will die instantly (Coral)
- Hybrid Sterility: When two species mixed two create a whole new species. The offspring will survive but cannot reproduce (Horse+Donkey=Mule)
11. What is polyploidy? What happens? Where is this common?
- Polyploidy is an example of very fast speciation. There is a mistake in the chromosome number. This is incredibly in plants
12. What is the theory of Punctuated Equilibrium?
- Change very fast over time rather than gradually.