Search found 30 matches

by NewtoBiology
Fri Jan 25, 2008 2:48 pm
Forum: Evolution
Topic: allopatric vs sympatric speciation HELP!
Replies: 7
Views: 26330

Thank you guys, Let me do some work and see what you think about my NewToBiology thought pattern. allopatric speciation: speciation that takes place in populations with geographically seperate ranges. Therefore the gene flow is initially interrupted or reduced because they are seperated by space. Sy...
by NewtoBiology
Fri Jan 25, 2008 1:54 am
Forum: Evolution
Topic: allopatric vs sympatric speciation HELP!
Replies: 7
Views: 26330

allopatric vs sympatric speciation HELP!

Hello, Can anyone explain what types of experiments I might conduct to measure allopatric speciation vs sympatric speciation. Lets say I have two different types of birds and one set of biologists argue that they are due to allopatric speciation while other biologists argue they are due to sympatric...
by NewtoBiology
Fri Jan 25, 2008 1:03 am
Forum: Evolution
Topic: Directional, Diversifying or Stabilizing selection?
Replies: 3
Views: 11093

Directional, Diversifying or Stabilizing selection?

Hello Biologists!!! Would you be so kind as to explain the following... During warm, dry weather large beetles had a greater number of offspring, while during cold, wet weather, small beetles had more offspring. is this an example of directional selection, diversifying selection, or stabilizing sele...
by NewtoBiology
Fri Jan 11, 2008 7:06 pm
Forum: Genetics
Topic: Dominant Alleles and rule of addition vs multiplication.
Replies: 1
Views: 16975

Dominant Alleles and rule of addition vs multiplication.

Hello Biologists! I am have just studying about Mendel and his genetic variations on pea plants. Now I have to apply the rule of addition and the rule of multiplication to a question. WOULD YOU ALL BE SO KIND TO ASSIST..... Rule of addition: when one event can occur in two or more alternative ways. ...
by NewtoBiology
Tue Jan 08, 2008 12:41 pm
Forum: Molecular Biology
Topic: MEIOSIS QUESTIONS ON DNA... HELP!!!
Replies: 6
Views: 2853

Thank you everyone! So just so that I 100% understand. Each chromosome has a DNA strand wound up in it? Therefore non-duplicating Chromosomes, that look like single fingers, contain one strand of DNA. Is this correct? Therefore in duplicating Chromosomes, that look like X's, there are two strands of...
by NewtoBiology
Tue Jan 08, 2008 3:56 am
Forum: Molecular Biology
Topic: MEIOSIS QUESTIONS ON DNA... HELP!!!
Replies: 6
Views: 2853

MEIOSIS QUESTIONS ON DNA... HELP!!!

Hello all Biologists! I am REALLY REALLY new to biology and I would so appreciate if ANYONE could help clear the air for me. I am currently studying about meiosis and need some help.... Q: For a cell that is 2n=8 answer the following: 1. how many molecules of DNA are in the cell at prophase I. I AM ...