Biology - April 2007

one haploid egg cell and three polar bodies,
four haploid egg cells,
one diploid egg cells and three polar bodies,
four diploid egg cells

2007-04-28 14:39:36 · 3 answers · asked by Anonymous

a test cross,
sex linked problems,
problems dealing with incomplete dominance,
problems dealing with multiple alleles.

2007-04-28 14:21:29 · 2 answers · asked by Anonymous

His phenotype is A and his genotype is AA ( I A IA),
His genotype is A and his phenotype is AO (I A i),
His phenotype is A and his genotype may be AA or AO (IA IA or IAi),
His genotype is A and his phenotype may be AA or AO (IAIA or IA i).

2007-04-28 14:17:09 · 3 answers · asked by Anonymous

The chromosomes synapse during metaphase,
No chromosome replication occurs between meiosis I and II,
The end product is 4 diploid gametes,
Crossing over reduces variation in a population.

2007-04-28 14:11:00 · 2 answers · asked by Anonymous

Gene A (no pigment/pink) ->Gene B (blue pigment) -->Brown Pigment Product

Aa,BB? aa,bb? aa,BB? AA,bb?

2007-04-28 14:08:25 · 2 answers · asked by Stacy 3

2007-04-28 13:55:18 · 2 answers · asked by Stacy 3

why is it that a frequency of an allele (for example a recessive allele) decreases over generation rather than just disappears from the population?

2007-04-28 13:17:28 · 3 answers · asked by qwerty_123 2

What is the difference in Biology between a Ecosystem and a Biome? What category would a regular rainforest that is tropical without any animals, just scenary go under, Biome or Ecosystem?

Also when I see animals in tropical rainforest pictures under yahoo images. How can I be able to label the type of animal if I don't know the name of the animal?

Thanks for your answers!!!

2007-04-28 13:12:56 · 3 answers · asked by Successor 5

how can pollution be stopped?

2007-04-28 12:49:10 · 9 answers · asked by girlshirls156 2

2007-04-28 12:43:32 · 2 answers · asked by Anonymous

2007-04-28 12:31:20 · 5 answers · asked by Anonymous

2007-04-28 12:21:02 · 3 answers · asked by Anonymous

2007-04-28 12:08:37 · 7 answers · asked by Jayy 1

2007-04-28 11:44:54 · 6 answers · asked by Anonymous

2007-04-28 10:48:17 · 3 answers · asked by nix.debra@sbcglobal.net 1

2007-04-28 10:32:11 · 5 answers · asked by Anonymous

the science behind it, answers will be greatly appreciated

2007-04-28 10:05:57 · 8 answers · asked by Anonymous

2007-04-28 09:40:09 · 4 answers · asked by missyn325 1

to thousands , would the genetic variability be high or low?

2007-04-28 09:09:58 · 4 answers · asked by Toni E 1

2007-04-28 08:10:24 · 3 answers · asked by Dantte 1

example in reseach uses mammalian than human being there is merit to use mammalian than human being, there any relationship between mammalian and human being so why use mammalian directy and not human being there is any demerit please tell me

2007-04-28 07:48:09 · 4 answers · asked by mswahili wa zanzibar 1

A. dose that will cause an infection in some of the test population
B. measure of pathogenicity
C. dose that will kill 50% of the test population
D. dose that will cause an infection in 50% of the test population
E. dose that will kill some of the test population

2007-04-28 07:39:11 · 3 answers · asked by Ms. please-answer-my-questions2 1

2007-04-28 07:25:07 · 4 answers · asked by Mike 2

Some scientists believe that humans are still evolving. Others argue that the technological and medical advances of the last few centuries have eliminated most of the selective pressures that directed 5-6 million years of human evolution. Is there any evidence that we are still evolving? What lies in our evolutionary future? Does it make any sense to predict the direction of evolution?

2007-04-28 07:23:31 · 6 answers · asked by Anonymous

2007-04-28 07:22:01 · 4 answers · asked by Anonymous

a. ribose

b. phosphate group

c. single-ring base

d. double-ring base

e. All of these are characteristic of every nucleotide

2007-04-28 05:20:56 · 6 answers · asked by Anonymous

Is it possible that a 4^300000 probabilities human's DNA molecule exists only because of a chance?
Why does a living coelacanth still exists? Shouldn't all of them evolute to amphibi?
If there's no mutant fertile even sex between the same mutant doesn't give any offspring then how does one species evolute to another?
What is the link between plantae and animalia?
Why the biogenesis do not occur again now as it did a few million years ago?
if evolution theory is right we should have a solid (continue) chain of species evolution process not a discrete one.

2007-04-28 04:59:15 · 8 answers · asked by Anonymous

I know the formula for a mono, and a di - but what is it for a polysaccharide. I know what it does, and its function, i just simply want the mathematical formula.

Thanks a lot

Also please please only answer if you definately know the answer, I had a big problem before when somebody guessed the answer incorrectly.

2007-04-28 04:49:18 · 5 answers · asked by mark_gg_daniels 4

a. are eukaryotes.

b. possess a nucleus.

c. use organelles for compartmentalization.

d. possess a nucleus and use organelles for compartmentalization.

e. are eukaryotes, possess a nucleus, and use organelles for

compartmentalization.

2007-04-28 04:48:09 · 2 answers · asked by Anonymous

If a child has type O blood and its mother has type A blood, could a man with type B blood be the father ? Why couldn't a blood test be used to prove that he is the father ?

2007-04-28 04:40:09 · 5 answers · asked by Anonymous