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I had blond hair until I was 3 and then it darkened. I don't know my hair genes but it could be many different factors like multiple genes controlling hair color or environmental conditions. My mom was red haired and my dad was brunette and all of us had blonde hair when we were born (all 4 of us) and at 3 we all lost it to brunette or dirty blond. So it yo baby and that's yo baby mama >O

I don't like to be a implement of support you should do your own research on it, but this is what I know. Mitosis is the conservation of ploidy as stated by Amitash and it has 6 phases. There is way more detail, but I don't think its all worth typing for a forum. Prophase - the phase where the chromosomes condense, nuclear envelope starts to desolve, and the centromere move to opposite poles. Prometaphase - the phase where nuclear envelope desolves and the mitotic spindles form (attaching microtubules to the kinetochores, position microtubules in the polar regions, and position microtubules in astral reagions). Metaphase- The sister chromatids line up in the center of the cell and get ready for anaphase (should be 46 sister chomatids (chromosomes) lined up) Anaphase - centromere divide on the sister chromatids and the sister chromatids are then seperated Telophase - Nuclear envelope reforms, spindle dissolves, and chromosomes uncoil Cytokinesis - the cell membrane segregates and the nuclei separate into daughter cells Meiosis is the halfing of ploidy again stated beautifully by Amitash and is a 2 stage, 12 phase, and has a 5 step process Prophase I - the phase where the chromosomes condense, nuclear envelope starts to desolve, cross-over occurs, and the centromere move to opposite poles. (summary) Leptotene - the chromosomes thicken but chromatids are invisible centrosomes move to opposite poles Zygotene - Homologous chromosomes pair (IMPORTANT POINT) and synaptonemal complex forms Pachytene - synaptonemal complex is complete and cross-over takes place (IMPORTANT POINT) Dipotene - Synaptonemal complex starts to disolve and depending on the organism the cell may arrest for later use (reproductive or germ cells) Diakinesis - the nuclear membrane begins to disolve and spindles form Prometaphase - the phase where nuclear envelope desolves and the mitotic spindles form (attaching microtubules to the kinetochores, position microtubules in the polar regions, and position microtubules in astral reagions). Metaphase I - The sister chromatids line up in the center of the cell and get ready for anaphase (should be 23 homologous chromosome pairs lined up) Anaphase I - centromere on the sister chromatids does not divide and the homologues are then seperated Telophase I - Nuclear envelope reforms, spindle dissolves, and chromosomes do not uncoil Cytokinesis I - the cell membrane segregates and the nuclei separate into genetically different daughter cells Prophase II- the phase where the chromosomes condense, nuclear envelope starts to desolve, and the centromere move to opposite poles. Prometaphase II- the phase where nuclear envelope desolves and the mitotic spindles form (attaching microtubules to the kinetochores, position microtubules in the polar regions, and position microtubules in astral reagions). Metaphase II- The sister chromatids line up in the center of the cell and get ready for anaphase (should be 23 sister chomatids (chromosomes) lined up) Anaphase II - centromere divide on the sister chromatids and the sister chromatids are then seperated Telophase II - Nuclear envelope reforms, spindle dissolves, and chromosomes uncoil Cytokinesis II - the cell membrane segregates and the nuclei separate into daughter cells That should be some of the basics. I might be off son somethings so look it up. From Genes to Genome is a good book to start.

She could have been heterozygous for x linked lethal, and this could then be passed down to her progeny and that's why you see the males showing up in progeny. There is a 50% chance of a male getting the lethal gene, but this makes it about 1/3 chance of male offspring. After that its all luck and she had female babies. Klinefelter's syndrome makes sterile Kikis' if they did get it.

I believe someone recreated the polio virus at my school in Stony Brook, but these other guys in the forum probably know WAY more than me about that. Also viruses are dangerous and making them even more dangerous so when you ask something like this you should post your reasoning. -"Testing on Aminals is Humane if you see it from Sophocles's Veiwpoint."

Its in French haha, but that is a cool site thank you very much and everyone else thats been helping me. Also: The nice part about being a pessimist is that you are constantly being either proven right or pleasantly surprised. Is rather brilliant

Right now we are going over RNAP, operators, operons, Activator, repressors inhibitors, PCR, sequencing methods, and DNA libraries. This exam is going to be a pain especially because we don't have a whole lot of practice problems and Voets books doesn't have the answers to the problems in the back. Any good references for those to? Exam will be waiting for me on the 25th...laughing. :/

I'm not doing so hot in Biochemistry class and one of the reasons is because I make stupid mistakes on exams (i'm terrible test taker with dislexic background), but another is this horrible textbook. We are told to read Fundamentals to Biochemistry by Voet and the material seems like its so condensed that it skips important facts that I need to know. Should I get his first book called Biochemistry? Because this text is so confusing that I cant sit and read it at all and reading textbooks is almost a hobby of mine. It lacks so much....please tell me I'm not crazy. I want to know this stuff. I don't care as much for the grades as I do for knowing this stuff.

In lab I was doing a His-Tag of FAAH SDS-PAGE and used commassie blue stain geling afterwards this then turned out to have a lot of bands that go all the way down to the front. I believe I messed up some where. I don't know if it has something to do with the gel, purification, or both. Can anyone help me on this? Ill attach the picture. We ran 2 gels and used them separately for the western blot (no number) and the commassie Blue (no name).

I've decided to enter the field of Genetics and Molecular Biology. I was wondering before the school year what would be some good References and/or Texts for Genetics. I am reading DNA Science: A First Course by David A Micklos... Where should I go from here? I have not read anything in Biochemistry yet and just finished Advanced Organic Chemistry. I've also been reading Introduction to Protein Structure by Carl Branden. This I think helps me understand geometry of molecules better, which I've been incorporating into my understanding of DNA structure. Any tips and suggestions would be greatly appreciated. -Lukas Klees