Genetics Definition and 198 Threads

Nicely done. Supercomputer? They say the animation is real time but wouldn't the real thing be much quicker?

I got my biology degree in 1979 and would like to get current again on DNA. What would you suggest? I'm in Japan so access to English books is quite limited.

Hello, I am a community college student currently in cellular and molecular biology. I wanted to do an honors project for this class and I was hoping I could get some thoughts or suggestions on this idea. My project idea is this; I want to help make anti venom through a new and creative way. I...

If we draw a punnet square, it would look like this Male on horizontal Female on vertical Cb Cb Cw CbCw CbCw Cw CbCw CbCw Does this mean that the offspring will have a blend of both black & white hair i.e. grey? Or is there something that is being missed here?

The first picture is the image given in the question, and the second picture is the possible genotypes given in the solution manual. How is it possible that person II.1 (first male in the second generation) has the genotype A/- when he is unaffected? I thought that because person II.1 and...

I just listened to a great podcast on the explosion of human genomic data about human migration, which ties in with the spread of ancient language groups, and reveals some of past cultural practices. It is Sean Carroll's Mindscape podcast #179; David Reich on genetics and ancient humanity...

The first question concerns reports by people who claim that there is a "force" pulling or pushing their hands when they hold their hands in front of them, close to each other, and parallel to one another, or while slowly moving their hands apart. Obviously there are no significant forces...

Here (A) is a product of recombination between a-&-b, (B) is a product of recombination between b-&-c and (C) a parent 1. If 1000 is the total number of progenies, then 10% of it is 100 (A), 5% is 50 (B) and the rest should be <850 because the other parent has not been included. So I reject 1...

Is there any DNA, biology, genetics and genealogy tests that i can take to find out what i am supposed to do naturally OR what I am naturally made for? for example, my sexuality or being straight, bisexual, gay. If yes, what do these tests tell me about my DNA, biology and/or genes? Even if its...

I think both Jane and Bill are carriers. I'm unsure if the answer is 1/4 (25%).

My Attempt: For the child to be affected, both the parents must be carriers. Hence P(child)= Probability of the father of passing down an affected allele x Probability of the mother of passing down an affected allele = 1/2 x 1/2 =1/4 The...

pg-363, sum-334 Attempt: The disorder is autosomal recessive. The probability = Probability of being a daughter x Probability of an affected child being born = ½×¼ = 1/8 x100 =12.5%

My Attempt: It appears to me that the three Hfr strains are derived from the same F+ bacteria. This info is absent in the question. Now on aligning all three sets of genes, the first and second set doesn't match completely. I do not understand why it doesn't as they are supposed to be...

I'm getting 3/32. P= Probability of a daughter x Probability of O blood type x Probability of Normal vision = 1/2 x 1/4 x 3/4 = 3/32

My brother has been in and out of rehabs for years, and lately I've been researching addiction and trying to understand the science behind it. A lot of sites that I've found say that addiction is genetic, but the info is extremely generalized and surface level. I haven't found any specific...

Homework Statement Question 2[/B] You mutagenize male flies with EMS. Next you mate an EMS-treated male fly to a wild-type female fly. (i) If you find an F1 offspring with a sleep-too-little mutant phenotype, what does that suggest to you about this mutation? (ii) You expect that majority of...

I got this question in an exam. Why do silent mutations always affect the third position of a codon? I have no clue about it.

Is there any research or study which is to estimate the weight of genetics in preventing one or more diseases compared to other factors? A lot of time, for example, explaining how a particular kind of cancer occurs in someone, genetics is often mentioned, in addition to other factors, but how...

Hi, currently I am a freshman who is majoring in Biosystems Engineering. I selected this major because I did a lot of research into biology undergrads and I didn't like what I saw. I got the notion that these majors did not emphasize the technical skills necessary to do well in a science...

Some people are more susceptible to allergies and common cold than others. For example, my mother and I suffer from dust allergies and blocked nostrils throughout the year. In fact, last year or so, my mother had to be hospitalised as her lungs had become stiff due to sudden allergy. Almost...

Hi could some one please explain Charging of tRNA (for dummies) ? Like i wanted info of the enzume complex during amino acid attachement and how the acceptor arm and CCA accepts the amino acid.

Homework Statement A wild type fruitfly was crossed with another fruitfly whose phenotype was not recorded. They had progenies in the following ratios. 3/8 wild type, 3/8 ebony body, 1/8 vestigial wings and 1/8 ebony body and vestigial wing. If the genes are located on different chromosomes and...

Homework Statement A researcher studied six independently assorting genes in a plant. Each gene has a dominant and a recessive allele: R black stem, r red stem; D tall plant, d dwarf plant; C full pods, c constricted pods; O round fruit, o oval fruit; H hairless leaves, h hairy leaves; W purple...

Why is gold un-reactive enough to be used as nanoparticles? Why do cells preform endocytosis upon detection of the gold delivery system? What are the chemical receptors active? Why is does it cause less genetic damage than doing it virally? Is this system partly designed to change the DNA of...

Homework Statement [/B] I am reviewing an example on the basics of the genetic code; this example is listed at the bottom of the following webpage: https://www.atdbio.com/content/14/Transcription-Translation-and-Replication.I have produced the example below and added Roman numbers to better...

They worry only about X-rays risks during pregnancy but not in pre-gravid wonen on pre-zygote oöcytes: https://www.radiologyinfo.org/en/info.cfm?pg=abdominct «Women should always inform their physician and the CT technologist if there is any possibility that they may be pregnant» But if a...

Homework Statement A study found that children with light-coloured eyes are likely to have parents with light-coloured eyes. On this basis, can we say anything about whether the light eye colour trait is dominant or recessive? Why or why not? Homework Equations Not Any The Attempt at a Solution...

I am referring to the behavioral variation of dog puppies in a litter. Some may be sissies, non combative golden retriever-ish, while others were born tough as nails. This is just as true for rottweilers as Golden Retrievers. Given that they are all raised together, thus living in the same...

Homework Statement Variation during reproduction is beneficial to the species but not necessarily for the individual? Homework Equations Not any The Attempt at a Solution I only know about variation during reproduction is beneficial to the species but I don't know anything about how it is not...

Homework Statement Rewrite following sequence as double stranded molecule, with an inversion of the sequence between nucleotide 4 and 12. 5'-TCTCGCATGGTAGGT-3' Homework Equations none. The Attempt at a Solution [/B] I've read in the textbook that you take the section and rotate it 180...

When mapping out re-combinations of a crossed trihybrid you have to account for the proportion of the offspring who do not share parental genotypes. Of the 8 possible genotypes stemming from this mating, 6 will be recombinant and two will be of parental genotypes. Your idea is to Map out the...

Related to the recent discussions on this forum about the potential for genetically engineering humans in the future, researchers from Stanford University recently published a fascinating article in the journal Cell, looking into the genetics of complex traits, like height, as well as the...

So you have two alleles for every one gene, and the chromosome is composed of 2 homologous chromatids that have one of the 2 alleles for the specified gene on each chromatid. when you have to replicate that chromosome the way I understand DNA replication is is that you have a serious of...

I have become invested in Anthropology since the second half of 2016. Now while I say I find Anthropology not serious, I exclude the genetic side of things since that is of course real. Also the historical and archaeological basis behind it. What I am referring to is the racial/physical side of...

Homework Statement Two flies were crossed one wildtype another double mutant sepia(se) and vestigial(vg) yielding 40% wild type 40% se vg, 10% se and 10% vg. The genes show- a.Complete linkage b.Incomplete linkage c.Independent assortment d. epistasis 2. The attempt at a solution Since no. of...

Homework Statement In linkage strength between any two gene loci is 70%,what would be the amount of crossing over between these loci? (a) 15% (b)30% (c) 70% (d) none of these. 2. My approach at understanding the concept I didn't find much about linkage strength from any authentic source. I...

Me: 6'0.125" Elder brother: 6'2.7" Sister: 5'9.25" Father: About as tall as my brother Grandfather (paternal side): I don't know his height due to him having passed away long before I was born, but he looked about as tall me in a picture Mother: 5'4.5" Grandmother (maternal side): Used to be...

I have come across two set of definitions which are not contradictory but different. From wikipedia: A constitutive gene is a gene that is transcribed continually as opposed to a facultative gene, which is only transcribed when needed. A housekeeping gene is typically a constitutive gene...

Individuals with 48, XXXY or 49,XXXXY are called variants of Klinefelter Syndrome by P.J.Russell,2010 (i Genetics). But I read a paper published in 2011 titled: 48,XXYY, 48,XXXY and 49,XXXXY syndromes: not just variants of Klinefelter syndrome. My question is why the physiological condition...

Why does increase in age of the mother increases the chance of having an offspring with Down Syndrome? I want to know the molecular basis of this observation. I'll be grateful if somebody could recommend an authentic source in this regard.

I think I understand these terms, not fully though and I can't distinguish between the two and define them.

According to https://www.ncbi.nlm.nih.gov/books/NBK21950/ and some other sources: 'Genetic code is the set of correspondences between nucleotide pair triplets in DNA and amino acids in protein.' What dose correspondences mean in this regard? I don't understand why nucleotide pair triplets and...

klotza submitted a new PF Insights post Polymer Physics and Genetic Sequencing Continue reading the Original PF Insights Post.

Hello everyone, So I'm a CS major college student. I've always been interested in biology, especially evolution and genetics; but recently I've been really interested in neurobiology. I read a lot from all kind of stuff and I thought I could read some books on these subjects. What I'm looking...

How many possible alleles are at a locus consisting of 3 base-pairs in a diploid? ugh, I am so confused... So, I guess a locus is just a spot for a gene, so the gene is also considered to consist of 3 bases. Gene: _ _ _ Each "_" could be either an A,T,C, or G. So there are 4 possibilities...

Hi everyone. Can someone please explain me how a two or three points test can be made, in the field of genetics? I've read of it in many books, but I'm looking for an explanation as clear as possible. Thanks in advance :)

Examples of recent studies and tests on this genetic disorder, preferably done in Canada?

Homework Statement A geneticist studying the number of bristles on the second leg of fruit flies determined that a wild-type strain has a mean number of 486.3 bristles per leg. A sample of males and females from this population with 420.0 bristles were bred and the offspring had a mean bristle...

Hello, In the picture above a couple are shown with their children. Or are they actually their children? Is it possible for them, having green (?) and hazel (?) eyes, to get 1 child with blue eyes and 3 children with brown eyes?

Hi, For starters, I am an Electrical Engineering student and have very little formal training in the field of Biology. Also, I am not sure if this question is more suited for the Bio or CS section of the forum. My questions are: - How is Bioinformatics used to observe genetic mutations...