Biology - February 2007

Assume that production of hairs on a plant's leaves is controlled by a single gene with two alleles H (dominant) and h (recessive). Hairy leaves are dominant to smooth (nonhairy) leaves.


What is genotype of a smooth-leaved plant?

What is genotype of a hairy leaved plant?

What are the possible genotypes of gametes produced by the smooth-leaved plant?

What are the possible genotypes of gametes produced by the hairy-leaved plant?

2007-02-17 04:34:17 · 2 answers · asked by Anonymous

Explain the implications of Mendel's law of segregation as it applies to the distribution of alleles in gametes.

2007-02-17 04:31:20 · 2 answers · asked by Anonymous

2007-02-17 04:15:27 · 4 answers · asked by Shouldbedoinghomework 2

I know that each NADH produced 3 ATP and each FADH2 produces 2 ATP.
10 NADH + 2 FADH2 = 34 ATP

but I thought that the electrons were used to combine with oxygen to form water? or does it mean that 34 H+(protons) go down ATP Synthase and produces 34 ATP?

2007-02-17 04:04:52 · 2 answers · asked by avalentin911 2

2007-02-17 04:03:45 · 2 answers · asked by Anonymous

I have this from the textbook. "For every two NADH moleculaes, one O2 molecule is reduced to two molecules of water."
So does protons H+ play a role in forming water? or does the H+ protons(4 protons) just go through the respiratory chain from the mitochondrial matrix to the intermembrane space?

2007-02-17 03:46:51 · 1 answers · asked by avalentin911 2

a. Z line
b. M line
c. H band
d. A band
e. I band

2007-02-17 03:37:58 · 4 answers · asked by M_J 1

I got this from the textbook.
"The spinning rod of the ATP Synthase brings about conformational change in the knob, activating sites where ADP and inorganic phospate combine to make ATP."
1. My question is where on earth does ADP and inorganic phosphate come from?

I also got this from the textbook.the last cytochrome of the chain, cyt a, passes it electrons to oxygen, which also picks up a pair of hydrogen ions from the aqueous solution to form water."
2. why is it necessary to have water form? what does water do? what happends after water forms and where does it go?

2007-02-17 03:20:50 · 2 answers · asked by avalentin911 2

why would it be more difficult for a small mammal to be active during the day and allow its body temperature to fluctuate than a large mammal such as camel??

2007-02-17 02:48:37 · 3 answers · asked by Anonymous

My question is to know how it is occur immunofluorescence analysis of the Intermediate Filament cytoskeleton in U373 MG Cells, plese give more details about it

2007-02-17 02:13:05 · 5 answers · asked by Jugux A 1

...year olds when running? serious answers only please.

2007-02-17 01:36:28 · 7 answers · asked by ? 3

2007-02-17 00:30:51 · 5 answers · asked by Eoin B 2

2007-02-17 00:24:03 · 2 answers · asked by detailedpig 2

We have hair almost everywhere on our body, but why not on our hand palms?

2007-02-16 22:11:17 · 8 answers · asked by currentlybluegreen 1

Can anyone tell me from where i can get biography of first women scientist, "LYNN MERGULIS"? Or, can ane one write me about her a bit....those who knows abt her, plz???

2007-02-16 21:38:12 · 3 answers · asked by Anonymous

i was thinking, i cant think of one single animal that doesnt have a tail. are humans the only creatures without one?

if so, why are they so important on animals, and unnecessary for humans?

2007-02-16 21:28:13 · 10 answers · asked by Erin P 2

why? why did they have to kill the poor creatures?

2007-02-16 20:26:22 · 3 answers · asked by aki_3092 1

2007-02-16 18:56:34 · 5 answers · asked by Bad Church Lady 2

2007-02-16 18:29:57 · 13 answers · asked by asianmr2 1

The question is:

In a population it was reported that the allele frequency for M was 80% and for N was 20% in the MN blood group system. M and N are CO-DOMINANT alleles. In your words, describe the steps used to determine blood group frequencies.

If I knew how to do this, I would use my own words....Please help if you can?

2007-02-16 18:13:15 · 2 answers · asked by snuggles24_04 3

throughout the whole process of cellular respiration. they mention electrons. but where do they come from? do they come from NAD+ reduction to NADH, FAD to FADH2?

- Just to make sure also.the H+ protons come from the oxidation of NADH to NAD+ and FADH2 to FAD. right?

2007-02-16 17:54:53 · 4 answers · asked by avalentin911 2

I've heard if you donate blood you can get paid some cash. Is this true?

2007-02-16 17:24:03 · 12 answers · asked by Anonymous

do you need to know all the steps of Krebs ceycle in a biology major? Biochemistry major?. Perhaps med school I guess.

2007-02-16 17:16:40 · 7 answers · asked by avalentin911 2

out of all things in the world we humans are like the only things with no natural defenses. I mean other things have camoflauge, colossal strenght, crazy speed, giant tusks, horns. We have nothing cool like that. Although we have THE THUMB :-D its not nearly as cool as some other things we could have... i mean an anaconda has like (if i remember correctly) ~5000 muscles where as the tiny human arm has only 5... c'mon, yes the thumb AND human brain is amazing but couldnt we get just another bonus like mor musles or spikes or something? what you guys think about this?

2007-02-16 17:15:13 · 9 answers · asked by Anonymous

-throughout the steps in cellular respiration. What does it mean when it says 2H+ like
( 2 NADH + 2H+)?
does it mean two hydrogen ions or two electrons?

2007-02-16 17:15:06 · 2 answers · asked by avalentin911 2

in Drosophila, graybody(G) is dominant over black(g) and normal wings are more dominant over short wings(w). A student performs the following cross: GgWw x ggww. Among the offspring, she finds the following: 115 gray body, normal wings; 27 graybody, short wings. 25 blackbody, normal wings; 120 black body, short wings. Should the student conclude that the genes for body color and wing shape are linked? Explain and present your reasoning.

Thank you guys :D

2007-02-16 16:57:32 · 3 answers · asked by simsadik 1

2007-02-16 16:55:35 · 4 answers · asked by Dennis0623 1

For each of these two haploid fitness sets, calculate what
the frequency of allele 1 would be for the next TWO
generations, starting from p=0.2.
genotype C1 C2
relative fitness1 1 0.99
rel. fitness 2 1 0.5

2007-02-16 15:30:31 · 2 answers · asked by motobecane 2

You sample a population of Salmonella typhimurium from a
popular local hamburger joint Howdyburger. You find 8 isolates
(clones) that are resistant to the antibiotics ampicillin and
kanamycin, 27 isolates that are resistant to amipicillin and
kanamycin, and 53 isolates that are susceptible to both
antibiotics. What is the frequency of each of the three types
in the Howdyburger population? What is the genetic
heterozygosity of the Howdyburger population?

I know that the frequencies are 1/11=.09, 27/88=.31, and 53/88=.6. But I don't really know what or how calculate the genetic heterozygosity?

2007-02-16 15:24:52 · 2 answers · asked by motobecane 2

Is deoxydenated blood really blue in colour?
Why is the veins on our wrists blue?

2007-02-16 15:19:51 · 7 answers · asked by formystudies3 1