Biology - February 2007

wings. Work the following crosses though the F2 generation, and determine the genotypic and phenotypic ratios for each generation. Assume that the P1 individuals are homozygous:
(1) gray, long X ebony, vestigial
(2) gray, vestigial X ebony, long
(3) gray, long X gray, vesitigial

2007-02-02 14:46:59 · 2 answers · asked by Anthony 1

2007-02-02 13:33:47 · 9 answers · asked by sharina j 1

What are the building blocks for the following:
1) carbs
2) Lipids
3) Protein
4) Nucleic Acids DNA/RNA

2007-02-02 13:25:17 · 2 answers · asked by ladyinredvet87 1

Which of the following statements about membrane structure and function is false?
a. Diffusion, osmosis, and facilitated diffusion do not require any direct energy input from the cell.
b. Special membrane proteins can cotransport two solutes by coupling diffusion down one concentration gradient to transport against another concentration gradient.
c. Diffusion of gases is faster in air than across biological membranes.
d. The types of proteins that are exposed on one side of a membrane are nearly identical to those exposed on the other side of the same membrane.

2007-02-02 13:17:33 · 2 answers · asked by Anonymous

All of the following membrane activities require energy from ATP except:
a. active transport
b. facilitated diffusion
c. proton pumps
d. translocation of K+ into a cell

2007-02-02 13:13:34 · 5 answers · asked by Anonymous

Why do they make my hair a certain color or my nose a certain shape? WHY WHY WHY?

2007-02-02 12:51:30 · 6 answers · asked by Anonymous

But here goes nothing:

My boyfriend's eyes are such a weird shade of blue that they're actually maroon. I though that this was impossible until I met him. He told me it was due to a benign mutation in his genetic code. What happened to his DNA that made his eyes come out that color?

2007-02-02 12:37:19 · 5 answers · asked by hottie_spaniard 2

2007-02-02 12:27:24 · 3 answers · asked by -yondaime- - 1

Please tell me!
<3333

2007-02-02 11:48:14 · 5 answers · asked by Anonymous

hi, apparently there are 8 functions for the human skeleton, but i have only been able to find 5, can anyone please enlighten me to the other 3?
i have found protection, attachment, support, blood cell production, mineral storage,
please please could someone enlighten me to the other 3.
thanx.

2007-02-02 10:13:42 · 13 answers · asked by honey_81uk 1

I dunno.. I think it would be horrible becuz.. that child would be considered a freak and would never fit in..

2007-02-02 10:07:04 · 22 answers · asked by Anonymous

2007-02-02 09:55:15 · 1 answers · asked by Greg M 1

2007-02-02 09:42:39 · 14 answers · asked by Georgeu 3

2007-02-02 09:41:26 · 12 answers · asked by Georgeu 3

And what is it in the developing world?

2007-02-02 09:38:22 · 2 answers · asked by Anonymous

2.Most populations on earth are affected by several factors, such as genetic drift, mutations, and natural selection. Which of the following statements can be made about a population that experiences changes in gene frequencies?

A.The Hardy-Weinberg equilibrium is maintained.

B.Evolution is occurring in the population.

C.Lethal genes will eventually be expressed.

D.Mutations will not affect the population.

2007-02-02 09:35:17 · 3 answers · asked by Penguin Lover 1

1.Which of the following individuals is most likely to allow a recessive lethal gene to be kept in a population over several generations?
A.homozygous dominant

B.homozygous recessive

C.heterozygous

3.A population of crocodiles is said to be in Hardy-Weinberg equilibrium. If so, which of the following must be true?
A. Genetic drift is taking place.

B. New individuals are migrating into the population.

C. Natural selection is placing pressure on allele frequencies.

D. No new mutations have occurred.

2007-02-02 09:33:27 · 4 answers · asked by Penguin Lover 1

2007-02-02 09:18:07 · 18 answers · asked by Anonymous

2007-02-02 09:14:06 · 13 answers · asked by catrin l 7

i know it has somethin to do with the plant cell

2007-02-02 09:12:45 · 10 answers · asked by la chappara 2

My mom never explained it to me.....

2007-02-02 07:52:57 · 28 answers · asked by (BaBii) (DeSii) 2

I know it sounds stupid but why does it sound stupid? why don't we ride cows? are they to week or something?

2007-02-02 06:58:03 · 3 answers · asked by awbbie 2

Bacteria reproduce asexually, through binary fission.
How, then, does genetic variation arise in a population of bacteria?

How does genetic variation within a bacterial population lead to antibiotic resistant strains?

2007-02-02 06:49:08 · 6 answers · asked by JoAnna 2

2007-02-02 06:41:09 · 4 answers · asked by Cheryl H 2

If later in life she has a baby will it inherit the immunity for that virus? How about to a bacteria?
Would this also be considered evolution?

2007-02-02 06:39:17 · 2 answers · asked by Anonymous

amylase is an enzyme present in saliva that begins the breakdown of starch. It is specific to its chemical reaction.

2007-02-02 06:07:13 · 4 answers · asked by Diane S 1

I wear glasses and my nose is most powerful. I love and hate smells. They bring memories back to me . Do you feel that way ,also?

2007-02-02 05:49:43 · 6 answers · asked by TCC Revolution 6

what kind of effect does B-complex vitamins have on the body? my urine is a really funny color, like a neon yellow...like glow in the dark type of yellow. any reasons why?

2007-02-02 05:39:40 · 3 answers · asked by Natalia 1

2007-02-02 05:39:32 · 3 answers · asked by Miss LaStrange 5

2007-02-02 05:30:14 · 11 answers · asked by tlt 1