Genetics

If Females as XX and males have XY is is possible to create a person with YY, and what do you think they would be like?

I'm curious as to the process of how eukaryotes combine and chromosomes. For example, a human male gamete and a human female gamete combine. What exactly happens during this process? How are the chromosomes that are inherited determined, and are they the only determination?

Hi I'm just getting into genetics I have my high school biology text book as one resource. Could any one help me find more resources ebooks, online articles, and books. Type of genetics research does not matter Im just getting started so thanks for all replies:eek:

It seems that they have genetically engineered bacteria to produce cellulosic ethanol much more efficiently. The bacteria in question is Thermoanaerobacterium saccharolyticum, a thermophilic anaerobic bacterium, now with the genes involved in organic acid formation knocked out, so that it produces ethanol as the only detectable organic product. Also, it functions at 50 C, and the higher temperature means it needs 2.5 times less cellulase. http://environment.newscientist.com/article/dn14693-new-bug-ferments-green-fuel-on-the-cheap.html http://www.pnas.org/content/early/2008/09/06/0801266105 Obviously, a cheaper way to turn cellulose into ethanol could mean at leas…

I would like to know if anyone has done genetic work relating to birds. I intend to set up a BioLab at home to do just that... Do I know enough ? ... no ! Will I do it anyway ? You bet !

Hello, I have a question about the aging process. We can often read in the scientific papers that part of the aging process is due to DNA diseases. Following this principle, I wonder why those mutations and diseases accumulated within a lifetime in the DNA molecule do not seem to be transmitted to our childs ? Briefly, why do babies still born young ? Are there any specific DNA repair systems within the gamet production or within the first embriologic cell divisions ? Do DNA really degrades ? Are there any other explanation that could explain this paradox ? I thank you for your precious help. Pierre.

Recent findings suggest blue eyes arose from a mutation in some melanin-controlling gene 6000 - 10000 years ago in a population that lived close to the black sea right? And then it spread from there. But how did that recessive trait suceed to spread so well? Im wondering if it was of sexual selection (that it was merely an pysically attractive trait), luck or practically benefiting in survival (i.e improved vision)? A guy i know argued that blue eyes arose in these more northern people because there is less sunlight, and blue eyes are better at absorbing light, so he was quite certain it came about of practical reasons. Personally i didn't quite agree, since when d…

How can a teenager get into genetics in some way. Im open to any suggestions thank you.

I was taking a break and went for a swim, this idea popped into my head. If you look at the DNA, in almost all cells, the DNA carrys a bunch of genes that have no apparent functionality, in its day to day life. These are often described as junk genes. The question I have is, why is the DNA such a pack rat? It is like the DNA's attic, basement and garage is full of junk it never uses in its day to day activities. The DNA is not a slob. He has all its junk neatly organized. But why does it keep all this junk. It would appear, life would be much easier if the DNA called Goodwill or the Salvation Army and had them come in and clean out the junk. The DNA would be leaner making…

can u help me . I want to download pdf files of micro biology . give me some links to down load.... it's urgent ,i want to prepare for exam.......

Death is accepted as a natural part of life. I have even heard educated people say: "The job of bacteria is to eat, reproduce and die." Death seems to be assumed as a natural component of life. Perhaps in some religious or an irrational dogma connected to a yin yang idea of some mythical balance to the universe. The fact is that biology tends to organize material and keep it that way. Bacteria don't die. They eat, reproduce daughter cells and continue themselves. They continually renew themselves. One has to define the process of reproduction as death to claim otherwise. Immortality does not protect an organism from diseases or fatal injury. None the l…

is there any evidence that latex intolerance (or intolerance to the pill, etc) is on the increase? I'm thinking that if there's a genetic basis, there should be some kind of reproductive benifit to having a harder time using contraception, but i can't find any papers on it.

Hello, I am having a difficult time understanding the concept of SNP's and polymorphisms in general. So far, I understand that a SNP is a change in a single nucleotide in the DNA sequence that occurs in greater than 1% of the population. If everyone's genome is not sequenced, then how does anyone know that this particular change in nucleotide is in fact in greater than 1% of the population? If we have a paternal and a maternal chromosome, does the SNP have to occur in one of these or both of these? So is there a chromosome set that everyone is comparing these changes in nucleotide to? Any help would be appreciated.

can an egg cell only be fertilized and start dividing by a sperm cell?

So, I for the life of me cannot put two to two together with these two questions. I don't know whether the formatting of the website is confusing me or not. If someone could work through these problems with me and explain, I would very much appreciate it. The website on the bottom of the post shows the genotypes. reeding #1 Morganne is an orange roan (orange with a brown nose). Her mother Lexie was an orange roan (orange with a brown nose). Lexie was bred to Valor - a blue Belton (black with a black nose). Give the possible genotypes of Morganne, Lexie, and Valor. Explain. Breeding 2 Belle is a tricolor with a black nose.…

Greering I am new, Engineer, Hybrid animals, I have a few questions relating to hybrid animals. The great cat family seems to interbreed and result in hybrids. Why is this? The horse family Donkey, hourse, etc, also do so, can they breed with a zebra or is to too remote genetically. Two questions? The dog family produces hybrids easily. Why is this? The ape and monkey family do not produce hybrids. Why is this? Forgive my ignorance on genetics as I am an Engineer not a geneticist. Anything that you can add about hybrid animals will be most appreciated. Human Ape hybrid for example! Regards Alan

after splicing in hnRNA during post transcriptional modification what is the fate of intron? If they don't have any information in terms of protein then what is the role of intron ? kindly give me some idea.

why only tRNA contain thymine? What is the role of Thymine in tRNA?

This is a bit of an odd one. About 4 years ago there was a sudden spike in the prevalance of Tibial Hemimelia, a deblitating genetic condition in Shorthorn cattle in the states (USA). It was calculated to have arisen from a single sire (bull) which then spread the recessive allele to its progeny. After a while, as I said above, the prevalence spiked, most likely due to distantly related progeny encountering their cousins/grandchildren and getting the TH phenotype expressed. Anyway the ASA (American Shorthorn Association) implemented a stringent protocol for dealing with this and included a list of known carriers in its monthly magazine. Since then there has been l…

Does anyone know how incomplete dominance works in inheritance and what traits does it usually effect?

Hmmm....okay, let's say that you have a lot of family members who have had diseases which could all have been genetically passed on. Then let's say that you inherited these genetic problems. Before 'sprung,' could the diseases be overcome through healthy lifestyle choices? Or is it an inevitable problem? --Please my ignorance--

http://news.bbc.co.uk/2/hi/science/nature/7474278.stm Interesting PR move for sure. I wonder what sort of ramifications this will have. "Charlie and the Chocolate Factory that Ecoterrorists Burned Down" ?

I wonder if this has been done so far, if not, is it today possible/conceivable? Im talking about engineering plants for producing secondary metabolites. Like, for example transplanting genes from a coca plant (the ones responsible for cocaine synthesis), and transfer it to say, a dandelion. So is it possible to make, say a dandelion, to produce cocaine today? Or for example a more useful metabolite such as taxol, cocaine was just a example, even though the idea of a genetically engineered fastgrowing weed producing expensive cocaine sounds tempting:P.

Hello, Here is a partly theoretical problem. You own a lab in the US that performs 75,000 genetics tests per year. Profit margins are OK but you want to increase it yet not lose any quality in output. You have the chance to relocate and kit out a new lab anywhere around the globe. Where would you choose to set up and why? Some factors to consider are: 1) English should be spoken or understood 2) DNA samples are being shipped regularly from the US Tom

Genetic modification is used on both animals and plants, and in the future there is a possibility that it can be applied on humans. So what is your view on this? Beneficial? Disturbing? Please reply!