Speciation & Isolation

What is speciation? Browse through speciation, causes of speciation, reproductive isolation, evidence of speciation BEFORE answering the questions below. What is a species? Organisms that can interbreed in the wild and produce fertile offspring Organisms that can't interbreed in the wild but produce fertile offspring Organisms that can interbreed in the wild and produce infertile offspring Organisms that can interbreed in the captivity and produce fertile offspring What is speciation? Production of gametes in the wild Production of new species Production of hybrids Production of new organisms When has speciation occurred? When populations no longer look the same When populations no longer have the same frequency of alleles When populations can no longer interbreed When populations are living in different environments A horse and a donkey can successfully mate to produce offspring known as a mule. Mules are sterile . Would mules be classified as a species? Yes, mules have enough of their own traits to be considered a species. Yes, the fact that have different number of chromosomes makes them a different species No, mules are too similar to the parent species No, due to their inability to reproduce successfully. The disappearance of a species refers to evolution migration extinction mutation Why is a zonkey infertile? What 3 things do they point out toward the end of the video? Explain Sort the following statements to determine which are examples of geographic isolationvs.reproductive isolation. Geographic Isolation separation of two populations by a physical barrier Examples: mountains, rivers, volcanoes Example: Galapagos finches! different islands, ultimately different species Reproductive Isolation caused by behavioral and temporal barriers Examples: differences in the mating season found in the toad species Bufo americanus and Bufo fowleri. Example: eastern and western meadowlarks will not mate with each other because they use different songs to attract mates.