Chapter 22 Padlet Discussion by CBEN 110 Section B https://padlet.com/jschoonm/jgo8f8s7npjc Copy the Chapter Learning Outcomes into your composition book. Use your notes to summarize each point that What questions and confusions do you have about this material? Please include your group number at the top of your padlet post. en-us 2017-01-18 16:26:25 UTC 2017-01-31 21:58:41 UTC hello@padlet.com Polyploidy https://padlet.com/jschoonm/jgo8f8s7npjc/wish/150062944 Are all allopolyploids polyploids first? Are all polyploids sterile unless they're allopolyploids? The difference between the two seems really subtle and I'm confused

]]> 2017-01-28 23:57:10 UTC https://padlet.com/jschoonm/jgo8f8s7npjc/wish/150062944 Question 5, Part G https://padlet.com/jschoonm/jgo8f8s7npjc/wish/150064621 The question asks how many chromosomes would be found in an allopolyploid plant if its parents had diploid numbers of 2 and 10, respectively. The book states for allopolyploid speciation in plants, the new species has a diploid chromosome number equal to the sum of the diploid chromosome numbers of the two parent species.


 I added 2 and 10 together which should give a diploid of 12 but that answer was not correct. It says the answer is haploid number of 6. Why?]]> 2017-01-29 01:35:40 UTC https://padlet.com/jschoonm/jgo8f8s7npjc/wish/150064621 For allopolyploid: look at figure 22.10. The polyploidy occurs after formation of haploid gametes. So 1 + 5 = 6 chromosomes that somehow magically double the chromosome number to yield 2n=12. https://padlet.com/jschoonm/jgo8f8s7npjc/wish/150411761 2017-01-30 23:22:08 UTC https://padlet.com/jschoonm/jgo8f8s7npjc/wish/150411761 Be careful when thinking about polyploidy. on page 442: there are 2 distinct forms of polyploidy: Auto- and allo-. The allopolyploidy comes from a hybrid when "various mechanisms" change a sterile hybrid into a fertile allopolyploid. Compare figures 22.9 and 22.10 to see the difference between the 2 types of polyploidy. https://padlet.com/jschoonm/jgo8f8s7npjc/wish/150412167 2017-01-30 23:26:41 UTC https://padlet.com/jschoonm/jgo8f8s7npjc/wish/150412167 Different Species? https://padlet.com/jschoonm/jgo8f8s7npjc/wish/150691036 How do you know if two different species (that are similar enough to interbreed) will mate and form a hybrid compared to when they will only breed within their species. ]]> 2017-01-31 21:02:28 UTC https://padlet.com/jschoonm/jgo8f8s7npjc/wish/150691036 How do you feel now after you asked that question?!?! https://padlet.com/jschoonm/jgo8f8s7npjc/wish/150702537 2017-01-31 21:58:41 UTC https://padlet.com/jschoonm/jgo8f8s7npjc/wish/150702537