Florida International University

BIO 3063

19.1 Formation of a new Species

1)What is the definition of a biological species?

2. Organisms of the same species have the highest level of DNA alignment and therefore share what?
3. Is a species’ appearance a strong indicator for an ability or inability to mate?
4. What is a hybrid?
5. Why are hybrids often infertile?
6. Populations of species share what?
7. When variations occur within a species, they can only be passed to the next generation along what two main pathways?
8. Which traits can evolve? Which means what about reproduction in genetic change?
9. The presence in nature of hybrids between similar species suggests what?
10. What is necessary for speciation to occur?
11. What are the differences between allopatric and sympatric speciation?
12. Gene flow, the movement of alleles across the range of the species, is relatively free because individuals can do what?

13. How does this impact the frequency of an allele?
14. What occurs when populations become discontinuous?
15. What happens if a separation lasts for a period of time?
16. What are some of the things that can differ for the two populations causing natural selection to favor divergent adaptations in each group?
17. How can isolation of populations leading to allopatric speciation occur?
18. The nature of the geographic separation necessary to isolate populations depends entirely on what?
19. What are the two categories for allopatric processes?
20. What condition makes speciation more likely to occur between two groups that once were the same species?
21. What is adaptive radiation?
22. How does sympatric speciation occur?
23. What is aneuploidy?
24. What is polyploidy?
25. What are the two main types of polyploidy that can lead to reproductive isolation of an individual in the polyploidy state?
26. What is autopolypolidy?