Search found 155 matches

by Khaiy
Tue Feb 28, 2006 7:34 pm
Forum: General Discussion
Topic: xenobiology
Replies: 23
Views: 11988

I heard a fairly complelling argument against it once, actually. The conditions under which life can form are a very narrow range, and even under the appropriate conditions it's still ridiculously unlikely for the necessary amino acids to combine and form the corresponding proteins. Even after this,...
by Khaiy
Tue Feb 28, 2006 6:03 pm
Forum: Genetics
Topic: I need help w/ two Hardy Weinberg Problems plz
Replies: 5
Views: 7061

Yeah, that sounds about right. You need to find q^2, which is the number of people expressing the trait divided by the total number of people. Then, you take the square root of that number to get q. 1-q=p, and then you should have enough information for the rest of the equations.
by Khaiy
Tue Feb 28, 2006 5:59 pm
Forum: Genetics
Topic: Question about Mendel's experiment
Replies: 6
Views: 4301

Mendel noticed differences in flower color on pea plants, and he wanted to study the inheritance patterns of them. That's how he designed his experiment (he had classical training in physics, so he knew how to adhere to the scientific method). Based on the results of his experiments, he calculated f...
by Khaiy
Tue Feb 28, 2006 5:33 pm
Forum: Evolution
Topic: Evolution Questions
Replies: 2
Views: 2253

To do this problem, you have to understand some basic relations inherent to Hardy-Weinberg. The most important ones to use here are that q squared is equal to number of recessive individuals, and q=number of recessive alleles. You started out right, 1/400=.0025 recessive individuals. This is equal t...
by Khaiy
Tue Feb 28, 2006 11:54 am
Forum: Zoology Discussion
Topic: Designing a creature
Replies: 11
Views: 8562

I suppose you could just give it whatever neurons you wanted, as long as you could explain why the traits might be useful in its pursuit of glucose. In my opinion motor neurons should be present so that it can actively move towards glucose sources, and sensory neurons of some sort so it could seek t...
by Khaiy
Tue Feb 28, 2006 11:48 am
Forum: Evolution
Topic: Evolution Tests With Bacteria
Replies: 87
Views: 65062

1. I believe that you're right about the phylogeny being irrespective of genetic differences (Linnaeus based the taxonomy we use today on physical ovservances alone. I wouldn't be surprised if they were all relative, based on divergences as shown on phylogeny charts). 2. Like I said in an earlier po...
by Khaiy
Tue Feb 28, 2006 3:51 am
Forum: Evolution
Topic: Evolution Tests With Bacteria
Replies: 87
Views: 65062

He was a priest, he wanted to create a lexicon of all of God's works, so that they could be properly glorified or something along those lines. I've done phylogeny charts which sort organisms into categories according to the number of certain traits that they have in common. I've never seen one eithe...
by Khaiy
Tue Feb 28, 2006 3:32 am
Forum: Molecular Biology
Topic: Toxicated bird species & Leeches
Replies: 3
Views: 2745

I don't know anything about leaches, but I can hazard a guess about the birds. I've never heard of one, and it seems unlikely because of the structure of a bird. The feathers are hollow, allowing a lighter weight to allow flight. To fill them with a fluid like venom would greatly increase this weigh...
by Khaiy
Tue Feb 28, 2006 3:10 am
Forum: Molecular Biology
Topic: DNA Sequence
Replies: 11
Views: 5086

The specific mechanism for that reassortment is called "independant assortment", and that along with crossing over lead the odds of producing identical gametes in the billions, if not trillions. However, somatic cells are basically the same (there are exceptions, but they are just that). T...
by Khaiy
Tue Feb 28, 2006 2:54 am
Forum: Evolution
Topic: Evolution Tests With Bacteria
Replies: 87
Views: 65062

The reasoning for classifications above species are based on the same taxonomic model that species themselves are based on, they simply become more and more broad the higher up you go on the tree. For example, all eukaryotes share certain characteristics (like the presence of a proper nucleus), but ...
by Khaiy
Tue Feb 28, 2006 2:47 am
Forum: Evolution
Topic: Evolution in Islands
Replies: 2
Views: 2815

That makes sense, it sounds a lot like allopatric speciation to me. New environmental pressures located in an isolated area cause devergence from evolutionary patterns of animals in other areas, with other pressures. And if the isolated group comes into contact with the mainland then they need to ad...