For courses I teach at California State University, Fresno (including Genetics, Molecular Biology, Evolution, Developmental Biology, and others). All views my own.
I think it's only really easy if you own a Mac...but if you are on Windows, you are definitely screwed. The "results & tools" for instance, is not a link on Win. So there's no access to those other tools. Also, I tried to find an app, but currently, I'm also screwed (I guess) as I have Android, and there is no FamilyTreeDNA app available. Weird, huh. Considering a lot of people use Windows, you'd think they would make it a bit easier. Instead, you have to download these weird unknowns to deal with the fact.
I wasn't convinced at first, but watching how I blasted all over the "place" in less than a month was shocking, I used what I talked about the other day, and although it actually took about 5 weeks for my volume to double, I just go'ogled Jan Venstaker's Shooting Ropes and her reaction has been priceless!
👌It is a videography trick. As you can see, I'm being filmed through a piece of glass that I'm writing on. After recording, the video is flipped horizontally, which makes the writing look normal to the audience…and means that I look "backwards" (i.e. if you knew me, you'd know I'm not left-handed, but it looks like I'm writing with my left hand in the video. That's really my right hand.)
Good question. If this was a free 3' end of a DNA strand, then it would be hydroxyl (-OH). My intention in drawing this was to suggest that the 3' O is covalently bound to the 5' phosphate of the next (down, in the orientation I was drawing) nucleotide, which is why I didn't include the hydrogen (H).
In my example the wild type and homozygous recessive have frequencies or amounts of 3 and 4 and my double crossover categories are 450 anf 460. I can only find examples with these same ratios as this video and never what I just postulated. Can you tell me what to do when you're parental is the smallest category and your double cross is the biggest? There are six total categories and I was told it was dropsophilia: a female heterozygous crossed with a male homozygous recessive.
Respected sir, you explain it so clearly, it helped me a lot. But at last part there is a small mistake. Recombination of A-B is 239 (as you write it) but B-C is total 261 and between A-C it is 482. Thus the gene order will be ABC. Kindly check it ...😊🙏
Hello - you're absolutely right. I had already noted this in the written video description under the video (which you have to expand to read). I wish that RU-vid had an easy way for me to edit the video or another way for me to more obviously point out this error. Thanks for writing.
Sir my wife when she going FOR scanning in scanning WE GOT REPORTS LIKE THIS 47XYY Now doctor suggest me remove the pregnancy Next time time we are planning for again this error coming
12:50 it is 261, not 482😊. He accidentally put it for B to C recombinants, as he was referring it from his notes. And thus obey the additive rule🎉. Thank you so much❤for this crystal clear explanation and i want to become someone like you when it comes about explaining science things. Keep going🎉 You earned a subscriber..
Thanks for the kind comment. I did catch that issue and noted it in the video description, but very few people probably look there! I wish that RU-vid had an easy way of making these sorts of notes in the context of the video itself, so I could point this out at that specific point in the video
I am a plant genetic engineering student. I just discovered this channel. I can feel the values of these lectures. I hope I can benefit from your precious lectures. Thank you!
Note that IntDen might not show up by default in your Results window. If it does not, then use the "Set Measurements…" option in the Analyze menu and make sure that "Integrated density" is selected before taking a measurement.
Question, in computer science, polymorphism is when we basically have a main class; parent and sub classes inherit the parents attributes.. I would assume that polymorphism would be similar in the fact that the tested DNA sample would show attributes of a parent.
Interesting: I had no idea this was a term that was used in more disciplines than biology. Thanks for sharing. Here's a resource with good information www.genome.gov/genetics-glossary/Polymorphism. Briefly, in genetics, a polymorphism ("many forms") refers to a DNA sequence like a gene that has different "versions" (alleles) in different people. For example, almost all humans have two copies of each chromosome: we inherit one version from each of our two parents at fertilization of the egg. So, a particular DNA sequence of a chromosome might be ATGATC. No two humans are exactly genetically identical (we have 3 billion "letters" comprising all of our chromosomes), so I might have inherited ATGATC as part of one chromosome from my father, and ATGATG (note the change in the sixth letter) as the same part of the same chromosome from my mother. That sixth nucleotide is polymorphic in me: my two chromosomes don't have the same DNA letter (nucleotide) at the same position. More broadly, a polymorphism means that more than one version of a DNA sequence exists (either within one person, as my example above) or with a population or species (for example, the presence of ABO blood types in humans is a form of polymorphism).
I am filmed as it appears (through the glass board) and then the video is flipped across the vertical axis, so the writing looks forward to you but I am reversed (e.g. I'm not left-handed)
