Homework Help

You are studying a gene that controls ossicone (horn) length in giraffes. The wild-type long-ossicone allele (L) is dominant to the mutant short-ossicone (l) allele. However the L allele is only 60% penetrant. You cross two heterozygous giraffes. What phenotypic progeny classes do you expect and at what frequencies (assume the penetrance of L applies equally to both homozygotes and heterozygotes).

Would anyone mind confirming that my calculation is indeed correct. Fnet = ma 1N = 1kg/ms^-2 1N --- = 1ms^-2 1kg therefore 1Nkg^-1 = 1ms^-2

I'm totally new to learning physics and was presented with this problem but the answer was never recorded during the lecture so I'm just checking on here if I solved it correctly or what went wrong.. "On the Monark Bike - What is the force required to determine a power output of 100W when pedaling at 50rpm?" 20N = 4kg x 5m/sec 100W = 6000J / 60sec *just to note 1 revolution of the pedals will move the bike 6m

I'm not sure what i'm doing wrong for the following question: "An object is dropped from a tower. If it had been thrown down at 60m/s, it would half taken have the time. What is the height of the tower? (Note that acceleration is 10m/s^2 here)" So the parameters should be: V (initial): 60m/s V (final): 0m/s A: 10 m/s^2 T: 6 s And if I used the equation D = V (initial)*T + 1/2 a(t)^2 and subbed it all in, I ended up with 540m for the height. But the answer is supposed to be 320. Does anyone know what I did wrong?

Hello, could someone help me with this question please? Explain how burning wood or coal to heat your house may contribute to global warming by altering the energy balance at the Earth's surface. Thank you:confused:

Hello, I could do with some help on this question. Thanks, "Explain how and why Urea levels are maintained in the blood" (Clues: Bladder, Kidney's) Thanks all, James

I'd appreciate any help, as I am aware that these kinds of problems are only slightly tedious. Thank you in advance! My answer seems a tad low for a Kc value, which is why I am asking on here. A mixture of 0.546 mole of carbon monoxide and 0.407 mole of bromine was placed into a rigid 1.21-L container (i.e. these are initial amounts) and the system was allowed to come to equilibrium. The equilibrium concentration of COBr2 was 0.246 M. What is the value of Kc for this reaction? Use an ICE table to help you. Round your answer to three significant figures. After doing the ICE table, hopefully correctly, I got the following equation: (.246)/ (.45124-x)(.33636-x)=…

Hello im doing a course in electrical engineering in college, and ive came into a block about working out things on either the primary or the secondary windings of the transformer (Ie, the current, the power, the voltage, or the Turns.) Now i don't know if this is an American forum or a universal one or a UK site, what ever, In the UK, .Voltage = V .Current = I .Turns = N .Power = P Im alright in questions such as ... Eg.If the primary winding has a voltage of 100v and secondary winding has a voltage of 200v and the Current on the primary winding is 30Amps what is the current equal to on the secondary windings, I can do these with ease, its when it g…

I'm doing some homework for physiology and this is one of the questions: "Striking the ulnar nerve in your elbow against a hard surface (sometimes called “hitting your funny bone”) initiates action potentials in the middle of sensory and motor axons traveling in a nerve. In which direction will those action potentials propagate? Explain." So I have two questions: 1) I said that it will travel in both directions since there is no absolute refractory period to prevent it from traveling back towards the axon hillock/soma. Is that correct? 2) If that is the case, what would happen when the action potential that is moving backwards reaches the soma? Does it a…

I'm writing a project (due monday) and I need some help about the process of how the ozone layer absorbs UV light. I really need help on this. Oh, and I need at least one method to prevent the loss of the ozone layer.

Rewrite f(x) = 4csc^2(x) + 9tan^2(x) in terms of cos(x). NOTE: Expressions such as cos^2(x) must be entered as cos(x)^2 or (cos(x))2. I rewrote csc(x)^2 as 1/1-cos(x)^2 and tan^2 as ((1-cos(x)/cos(x))^2 I'm having a hard time simplifying that down to just cos(x).

hi there, im new to this website and this is my first thread, dont know what to expect but i have high hopes. so here goes. i am doing some research on how electric guitars work, i have some basic ideas of how the vibration of the string is converted into electricity via the pickup. but im still not sure. here are the things i need help with 1. how do standing waves relate to guitars? 2. how is the frequency of the note affected by the properties of the string? 3. how does the pick-up work? 4. how do we adjust the output volume of the guitar? any help is appreciated, thank you. i hope this is the right section

Hello, I am a tutor and one of my prospective students needs help in several subjects one of them being high school accounting. I never took the class but I do have a stong background in math. I did not know if high school accounting went over more math or buissness definitions. If some on could be so kind to give me a syllabus of what subjects would be covered and possibly some practice problems/homework it would be greatly appreciated. Thanks

I figured that this would be the best place to ask, even though this is not homework. I'm trying to look into this research project so that I can apply to volunteer there- but I'm completely lost in the language. I get that it's looking into the causes of schizophrenia, which is something I'm very interested in. Help? "My laboratory studies plasticity and neural adaptation in mesocorticolimbic systems. We have focused on the nucleus accumbens (NAc) due to its involvement in addiction and certain symptoms of schizophrenia (i.e., sensorimotor gating deficits), but we are currently developing strategies for elucidating caudate dysfunction which may afford a more unifi…

I just registered to this forum to get some information from people with knowledge of Special Relativity, Quantum Mechanics and Math. I've been really interested in the subjects described here (Relativity, Quantum mechanics and more advanced math). So far I've done the following at my school: Newton's laws and describing motions, basic electricity and magnetic stuff, differentiating, integrating and geometric formula's (sine, cosine functions). Does somebody have any URLs of websites or names of books that describe any of the described subjects from the level of education I'm currently at. The teachers at my school are unwilling to give me any information about these …

After truning yellow gold darkbrown/black with lye, will the gold ever return to it's original color?:

. The dominant allele for Huntington disease is segregating in the pedigree shown below. Also shown is the pattern of DNA bands observed for a restriction fragment polymorphism. Interpret the banding pattern to be the phenotype of a codominant gene. The bands are designated by the numbers 1 and 2. Use HD and hd for the Huntington alleles, and A1 and A2 for the restriction fragment alleles that yield bands 1 and 2, respectively. a. Deduce the genotype of each person in the pedigree with respect to the Huntington gene and the restriction fragment polymorphism locus. b. Suggest a reason why no persons are observed who have only the smaller DNA fragment (fragment 2, t…

The radioactive isotope tritium decays with a first-order rate constant k of 0.056 year-1. What fraction of the tritium initially in a sample is still present 30 years later? By using the formula .693/K, I get the answer 12.375 years is the half life. I am honestly stumped as to what is next. Any guidance would be greatly appreciated. Thanks

Hello, could somebody please help me with the foll:- question? three of the gases below could behave as greenhouse gases, identify them. a) NH(subscript 3) b) CL (subscript 2) c) Ne d) CO e) SO (subscript 2) f) N (subscript 2) kind regards

Ive drawn this chart regarding a few general things about each step. However i am not certain if the membrane potentials are correct. Resting State(Stable) ++++ +++++ __________ ------------ Depolarization (Unstable) ++--++-++ __________ --++--++-- Rising Action Potential (Unstable) ++--++-++ __________ --++--++-- Falling Action Potential (Unstable) ++--++-++ _________ --++--++-- Undershoot(Repolarization) (Stable) ++++++++ __________ -------------- This is perhaps the stupidest question of them all however, i cant take any risks.

I started taking QM this semester and I am a bit confused with this question: "In the Compton effect, if the incident radiation has wavelength [math]\lambda_{0}[/math], what is the maxima wavelength that the scattered radiation can have, and for what angle will this happen?" So, maxima/minima is calculated using a tangent, so I figured I will differentiate the equation: [math]\lambda_{0} - \lambda = \frac{h}{mc} ( 1-\cos{\theta} )[/math] With respect to [math]\lambda[/math], but that made no sense (=0?). So, I figured I'll go a step back on the derivation of the equation and try from there: [math]\frac{h^2}{\lambda_{0}\lambda}(1-\cos{\theta})=mc(\f…

How would your unknowns calculated molar mass be affected if you spilled some of it after weighing, but before you put it in the solvent? Ok, so less solute means less depression, so delta T is smaller. By this equation: deltaT=Kf x m that would mean calculated molality would be less, which would give you less calculated moles, which would give you a higher molar mass since you are still using the same mass value in the molar mass calculation. So that means that a higher molar mass depresses the freezing point less? I thought it was the other way around. Am I missing something here?

Not sure if this is in the right thread, but... We had finished a lab in which we were supposed to observe and take pictures of budding yeast cells We're now supposed to make a biological drawing. Since the yeast cells are so small, they fit across the field of view about 50 times or so, but we only need to draw one of them (budding). Are we supposed to scale them so that they would cover more space on the page, or keep them in their original size? And if we scale them, do we also have to indicate the scale? (e.g. 1cm of our drawing = 0.05cm of the actual?) I'm just wondering because, in my beginner years, we were taught to draw both an actual diagram AND a s…

Nevermind, I got it!

I was helping my little cousin with his math hw, and one of the questions was predicting points on a graph. They gave you a table: X | Y .5 | 2 1 | 1 2 | .5 4 |.25 5 | ? 10| ? Now, obviously this is just y=1/x just from looking at it. It's easy to see what happens to Y as you increase X. But I didn't know how to explain it to him algebraically if he gets a similar problem on a test, and he is not able to see trends in his head like more experienced people can. I also don't know if they are going to give him unknown values that are unrealistic to every number out to. This is embarrassing, but how do I explain this to him?