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5:59 LTE Expert Q&A Done why the second one is not right? The following question is based on information from Kondo Y. and Kashiwagi A., Experimentally induced autotetraploidy and allotetraploidy in two Japanese pond frogs, Journal of Herpetology 38(3):381-92 (2004) Two researchers experimentally formed tetraploid frogs by fertilizing diploid eggs from Rana porosa brevipoda with diploid sperm from Rana nigromaculata. When they allowed the tetraploid frogs to mate with each other, most of the offspring that survived to maturity were tetraploid, with chromosome sets of both diploid parent species. Based on these results, if this type of tetraploid formed in the wild, what would be the most likely result? The two parent species would interbreed and fuse into one species The two parent species would recognize each other as mates The tetraploids would be reproductively isolated from both parent species. The tetraploids would invade the habitats of both parental species and cause them to go extinct

          5:59
LTE
Expert Q&A
Done
why the second one is not right?
The following question is based on information from
Kondo Y. and Kashiwagi A., Experimentally induced
autotetraploidy and allotetraploidy in two Japanese
pond frogs, Journal of Herpetology 38(3):381-92
(2004)
Two researchers experimentally formed tetraploid
frogs by fertilizing diploid eggs from Rana porosa
brevipoda with diploid sperm from Rana nigromaculata.
When they allowed the tetraploid frogs to mate with
each other, most of the offspring that survived to
maturity were tetraploid, with chromosome sets of
both diploid parent species. Based on these results, if
this type of tetraploid formed in the wild, what would
be the most likely result?
The two parent species would interbreed and fuse into
one species
The two parent species would recognize each other as
mates
The tetraploids would be reproductively isolated from
both parent species.
The tetraploids would invade the habitats of both
parental species and cause them to go extinct

Show more…

5:59
LTE
Expert Q A
Done
why the second one is not right?
The following question is based on information from
Kondo Y. and Kashiwagi A., Experimentally induced
autotetraploidy and allotetraploidy in two Japanese
pond frogs, Journal of Herpetology 38(3):381-92
(2004)
Two researchers experimentally formed tetraploid
frogs by fertilizing diploid eggs from Rana porosa
brevipoda with diploid sperm from Rana nigromaculata.
When they allowed the tetraploid frogs to mate with
each other, most of the offspring that survived to
maturity were tetraploid, with chromosome sets of
both diploid parent species. Based on these results, if
this type of tetraploid formed in the wild, what would
be the most likely result?
The two parent species would interbreed and fuse into
one species
The two parent species would recognize each other as
mates
The tetraploids would be reproductively isolated from
both parent species.
The tetraploids would invade the habitats of both
parental species and cause them to go extinct

Added by Eva M.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

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Solved by Expert Katlin Koehn

04/03/2023

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Step 1: The researchers experimentally formed tetraploid frogs by fertilizing diploid eggs from Rana porosa brevipoda with diploid sperm from Rana nigromaculota. Show more…

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What makes number 2 wrong? Why would the new offspring not know each other as partners? 5:59 ITLTE Expert Q&A Done Why is the second one not right? The following question is based on information from Kondo Y. and Kashiwagi A. "Experimentally induced autotetraploidy and allotetraploidy in two Japanese pond frogs." Journal of Herpetology 38(3): 381-92 (2004). Two researchers experimentally formed tetraploid frogs by fertilizing diploid eggs from Rana porosa brevipoda with diploid sperm from Rana nigromaculota. When they allowed the tetraploid frogs to mate with each other, most of the offspring that survived to maturity were tetraploid, with chromosome sets of both diploid parent species. Based on these results, what is the most likely result? A) The two parent species are species. B) The two parent species recognize each other as mates. C) The tetraploid would be reproduced by both parent species. D) The tetraploid would be a hybrid of both parent species.

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Transcript

00:01 We are going to look at three different evolution questions.

00:03 The first one is about natural selection.

00:06 Now, natural selection is how often phenotypes are passed on to the offspring that are favorable for surviving in that environment.

00:17 And the question asks, which one of these four options does not fit natural selection? it is not an assumption of natural selection.

00:26 Now, natural selection is about phenotypes.

00:29 So down here where it says phenotypes comes from genes that is in the hands.

00:32 That is true and that is not going to be your answer.

00:37 Next up, phenotypes influence the reproductive success of an organism that is true.

00:48 So that is not going to be your answer.

00:50 Because if you have those certain phenotypes that are favorable to surviving, you're more likely to have them.

00:59 You're going to pass them on and that is natural selection.

01:03 Next up, population has phenotypes.

01:05 In order for those other two to be true, that one also has to be true.

01:07 And that's what all natural selection is built on, so that is not your answer.

01:12 And then we have, an organism must have more offspring than will survive.

01:19 That is often the case, but it is not an assumption of natural selection.

01:23 Natural selection, which is passing on favorable phenotypes, does not say we have to have more offspring, so that's it.

01:35 Next up we have post -zygotic reproductive barriers.

01:40 Post -zygotic means that it happens after the zygote begins to form.

01:45 So we have to have fertilization and a fetus start to form.

01:48 So down here at the bottom, ineffective pollen transferring.

01:52 If you have flowers and you can't get the pollen from one to another, they're never going to fertilize, and therefore there's no zygo.

02:01 So that's not your answer.

02:03 Next up, pollen cannot fertilize...

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