Biology - May 2007

Biology

Matching

Choices: genetic drift; gradualism; natural selection; divergent evolution; punctuated equilibrium; mass extinction; mutations; gene pool; convergent evolution; radioactive dating; use and disuse

a. all genes in a population
b. brief periods of change interrupt long stable periods
c. changes in gene frequency in small populations
d. changes occur gradually over time
e. Darwin
f. Determining age of fossils
g. Gene or chromosomal changes
h. Lamarck
i. Many species vanish at one time
j. Mendel
k. Unrelated species become less alike
l. Unrelated species become more alike

Then,

Number the steps of Darwin’s theory in order:

____ Struggle for existence
____ Overproduction
____ Natural Selection
____ Variation

2007-05-15 17:11:42 · 3 answers · asked by Anonymous

diploid?? i dunno please help

2007-05-15 16:59:03 · 7 answers · asked by îbË 1

2007-05-15 16:55:41 · 7 answers · asked by Anonymous

Four genes are segregating. How many phenotypes are possible among the progeny of a cross between double heterozygotes, if two of the traits are partially dominant (or co-dominat) and two are complete dominants (assume no environmental effect)?

a. 13
b. 4
c. 42
d. 36
e. 8

The answer should be d, 36.

I know what partial dominance is but what is its significance in the problem? How should it be solved? Thank you for your help!

2007-05-15 16:17:19 · 3 answers · asked by me 1

If genetic engineering made it possible, would it be wise to give everyone who lives in malarious areas the HbS allele?

It sounds like a good idea but wouldn't this prove to be a bad idea when it comes to natural selection favoring resistant populations due to the overuse of antibiotics? This would cause a large, detrimental shift in directional selection right?

2007-05-15 16:11:20 · 3 answers · asked by L C 1

does it prove we all came from the same maternal parent .since the information on mitochondrial dna is only maternal.And can you add some other info on that.

2007-05-15 16:05:33 · 9 answers · asked by mark 1

a. nucleotide sequence of DNA
b. nucleotide sequence of RNA
c. amino acid sequence of a protein
d. activation of a gene
e. structure of ribosomes

2007-05-15 15:51:00 · 8 answers · asked by zhenichka07 1

i need some one to show me how to sketch a short section of DNA include the sugar groups, phosphate groups, bases, and hydrogen bonds, also circle around one nucleotide in the sketch. thank you if its a pic you can send it to jamiewebb_sactown@yahoo.com thanks alot

2007-05-15 15:12:47 · 3 answers · asked by Anonymous

Science has limits to how far it can go. Do you a agree or disagree? Why? What do you think about cloning?

2007-05-15 14:01:39 · 7 answers · asked by ;) 1

okay i dont mean to offend anybody or try to be funny or anything but if adam and eve were the first people created and gave birth to the first babies then dosent that mean were all in the same family and also doesn't that mean that were all doing incest. We are all making out and having sex with a member of our family. now keep in mind the bible never said anything about others non related created (I think)and you cant put words in the bible that aren't there. Can somebody shed some light on this? And also with the whole Adam and eve thing were did the dinosaurs come along and cavemen. We have evidence of dinosaurs but not of Adam and eve except the bible. Does the bible mention dinosaurs??? Is the bible a big lie? Now keep in mind i believe in god 120%

2007-05-15 12:57:44 · 14 answers · asked by AFTERLIFE2012 2

Which insects are active during the day and which insects are active during the night?

2007-05-15 12:34:12 · 4 answers · asked by john d 1

2007-05-15 12:19:40 · 3 answers · asked by FauxPas 2

2007-05-15 12:08:47 · 3 answers · asked by shannon2rocks 1

2007-05-15 11:56:08 · 14 answers · asked by andromeda 2

If the Theory of Evolution is true, why haven’t we seen a species start changing into a completely different species (not just a change within species, like a different breed of dog)? And shouldn’t humans be evolving into something more? I could sure use another pair of hands!

2007-05-15 11:09:11 · 14 answers · asked by Wendolyn 1

2007-05-15 10:40:52 · 5 answers · asked by jayfrumacrossthewater 1

Thanks a bunch!

2007-05-15 10:40:34 · 4 answers · asked by Anonymous

2007-05-15 10:32:06 · 7 answers · asked by RON C 3

Why do people think the brain is the most complicated and misunderstood organ of the human body?

2007-05-15 10:21:50 · 3 answers · asked by Hilda B 1

2007-05-15 10:21:00 · 3 answers · asked by ♥stacy♥ 3

2007-05-15 09:48:06 · 6 answers · asked by Anonymous

My roomie and I are having a debate. There are several questions posted about blood already, but we need some credible sources. Please help, we need to resolve this.

2007-05-15 07:25:02 · 6 answers · asked by Anonymous

It starts with Domain, and then there is six subdivisions in between and then ends with species?

2007-05-15 07:00:53 · 1 answers · asked by libby_42_00 1

I am confused about the facts about the recessive and dominant genes in red hair. I have had people tell me that red hair is a recessive trait, and both sides have to carry it for it to show up. I have also had people tell me that it skips a generation. I just want to know the facts so that when my child is born and it doesn't have the same dark red hair as my husband people, his mother mostly, who is convinced it's going to be a red haired child, can be set straight about the about the whole thing. Thanks.

2007-05-15 05:36:12 · 7 answers · asked by Anonymous

I have green eyes no one else in my family does , i heard people talk about recessive genes how far can they go back because no one from me to my great great great grandfather has green eyes

2007-05-15 05:21:06 · 6 answers · asked by Andreu 2

2007-05-15 05:16:49 · 1 answers · asked by Traci D 1

2007-05-15 03:15:11 · 7 answers · asked by Anonymous

My son is six yrs old< and I have a uncle that has terberculosis. Anyway my uncle had brought a juice, and shared it with my son. Can my son get terberculosis after he had drink off of my uncle.

2007-05-15 02:57:51 · 6 answers · asked by Anonymous

Think of other species like beetles & there are 1000's of varieties, cats have many different members of the cat family.
yet humanity only has the one.

why is this?

2007-05-15 02:39:23 · 21 answers · asked by thunor 5

why can a brown eyed couple produce a blue/green eyed baby?

2007-05-15 02:24:46 · 9 answers · asked by Anonymous