Genetics is the branch of biology that deals with the transmission and variation of inherited characteristics.

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Dihybrid Cross Help Please

lobe eyes female x crossveinless wing male F1 Progeny: Female lobe eyes: 5023 Male Lobe eyes: 4931 F2 progeny: Female wild: 1241 Male wild:630 Female lobe eyes:3803 Male lobe eyes:1892 ...
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Is there any other function of DNA?

We all know that DNA acts as a genetic molecule. Does DNA have any other function in the cell other than being a genetic material and carrier of information?
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Is there a term for when a detrimental gene can be positively selected for because of linkage to a very fit gene?

Let's say that some piece of DNA would be subject to extreme negative selection if it were independently inherited, but it is very closely linked to an extraordinarily fit gene, and so the complex it ...
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Cell division - meiosis

Really confused. How many chromosomes pairs do humans have in their sex cells? How many single chromosomes do humans have in their sex cells?
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What does characterization mean in a genomics context?

"The resulting libraries of gene sequences allow CDC and other laboratories to compare the genes of currently circulating influenza viruses with the genes of older influenza viruses and viruses ...
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About Hermaphrodite Mitochondrial Inheritance

From the textbook I've learnt that in general mitochondria are inherited maternally. However if the cross is between hermaphrodites (e.g. in C.elegans), where, in most cases, then should the ...
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What is the most important factors that affect our taste?

What ist the most important factor that affects our taste? our mood? (such like GERD) our genes? (more mascular people will need more protein) the food we ate recently? (to choose more diverse ...
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38 views

Are there genes in sex chromosomes that determine facial features?

My friends and I were bored enough to try out this activity. Picture a teenage boy in your mind. From this picture, remove any accessories (glasses, piercings, etc.), moustache or beard, then ...
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Shrink an animal using genetics [on hold]

I need to know this for a science project: Can you shrink an animal using genetics?
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40 views

Assuming if height was fully determined genetically, what would be the concordance between monozygotic pairs?

I fully understand the differences between monozygotic and dyzogtic twin pairings, but I wondered how I could put into words the reasons why the concordance would be very high. Derived from same ...
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What's the exact meaning of and how to derive the coefficient of the path from sire to offspring?

According to Wright's Coefficients of Inbreeding and Relationship, the coefficient of the path from sire to offspring is given as $p_{o \cdot s}=\frac{1}{2}\frac{\sqrt{1+F_s}}{\sqrt{1+F_o}}$ But ...
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Genetic mutations and new alleles

Amongst silent, nonsense and missense genetic mutations, is the latter the only one that leads to the creation of new alleles? If we define alleles as a specific form of a gene, and a gene as a ...
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897 views

Why would lethal genes evolve?

I've been reading through 'The Selfish Gene' by Dawkins. At a few places in the book he states that incest is damaging because it would give a very high chance of lethal recessive genes becoming ...
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25 views

How to search for all human diseases associated with a inversion on chromosome 22?

Is there any way to search for all diseases that associated with inversions on chr22? I found some online research databases like OMIM and disgenet but I don't know the correct nomenclature on how to ...
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31 views

What is a “homologous pair” of chromosomes in cross joining or cross over?

I never understand if the chromatids attached at the centromere is a homologous pair, or the male and female chromosomes?
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3answers
181 views

Swapping genes?

So, gene therapy is to take out a gene, correct its mutation, and put the corrected one back into the organism, right? Is it also possible to take out a gene from an organism and put in a totally ...
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Book recommendation on population/evolutionary genetics?

I have recently been involved in collaborations that require me to model the population genetics of eukaryotic populations. I fear I may either be "re-inventing the wheel" or making conceptual ...
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1answer
133 views

Mutation-drift equilibrium and among loci variance in heterozygosity

At mutation-drift balance, the increased heterozygosity brought by new mutations is exactly equal to the loss of heterozygosity due to genetic drift. At equilibrium, the expected heterozygosity for a ...
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68 views

Ancestral Allele and Hapmap

I notice on dbSNP rs6352 has an ancestral allele of G - http://www.ncbi.nlm.nih.gov/SNP/snp_ref.cgi?rs=rs6352 The hapmap in humans for this allele is very rare, the homozygous version practically not ...
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DNA. mRNA, tRNA [closed]

Can someone explain to me how transcription and translation works, especially the part about codes. And does amino acids has code or is it the tRNA?
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1answer
264 views

How significant is the genetic component of homosexual behaviour?

From some basic googling, I found that nobody has ever proven that people are born gay and that environment plays a great part in homosexuality. I wish to know if there is a genetic component to ...
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2answers
53 views

CRISPR/Cas for editing the human genome [on hold]

I know, that the CRISP/Cas approach for "cutting" the human genome is not completely suitable if we can't say not suitable at all. Because we have many repeats and this approach can bring to our ...
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154 views

Components of the concept of Developmental Noise?

Developmental noise is a concept that correspond to the amount of possible phenotypic variance of a given genotype in a given environment. Intrinsic noise (aka Cellular noise) is a component of ...
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112 views

Are males taller than females?

Is there any scientific evidence that males are taller than females? And the reason why they are taller (please include genes or hormones that accounts for human growth and how they are affected in ...
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1answer
52 views

What is the difference between multiple allelism and polymorphism?

Multiple allelism is defined as "the existence of more than two alleles of the same gene within a population." Polymorphism is "the occurrence of more than two distinct phenotypes of a trait in a ...
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1answer
30 views

A doubt on Introgression

Wikipedia says that Introgression, also known as introgressive hybridization, in genetics is the movement of a gene (gene flow) from one species into the gene pool of another by the repeated ...
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2answers
81 views

Is it possible to have different genes in different parts of our body?

I want to understand genetic mutation specially in the context of multicellular organisms like humans. I studied biology only till high school and I can’t fully understand wikipedia pages on this ...
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31 views

Deducing amino acid sequence from a DNA sequence

The suggested answer to the question is the following: "M L S C D K S D Stop". I do not understand how they get that result. The question is as follows: An RNA polymerase transcribes the following ...
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Breeding Southern Right Whales Genetics

I don't know much about biology. I just like watching David Attenborough videos and this made me curious. I just watched this video about breeding Southern Right Whales, and these two quotes puzzled ...
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110 views

How genetically similar are worker ants from the same colony?

I've been reading https://en.wikipedia.org/wiki/Ant and it says If the egg is fertilised, the progeny will be female diploid; if not, it will be male haploid. Since the males have only one set ...
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41 views

What further research can the result of gene variation detection be used for [closed]

We do a research on a particular cancer (for e.g. breast cancer). Now, we have a result for the gene variation detection (VCF file). What next steps do we need to do? We don't have a clear picture ...
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681 views

Can parents' learned traits be transmitted genetically?

I am wondering whether a behavioral trait (e.g. fear or stress experienced in the lifetime of the parent) can be transmitted genetically to its offspring? I understand that a behavioral tendency for ...
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Dominant model Disease SNP

Say that you have genotyped a SNP in a case control setting, and get the following result AA AB BB Cases 17 51 29 Controls 39 44 20 where A ...
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22 views

What the gene variation detection result can tell us about a cancer [duplicate]

We do a research on a particular cancer, now we have a result of the gene variation detection . What next steps do we need to do? we don't have a clear picture about this. Can you give us some ...
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33 views

How do biologists quantify “gene expression” in experiments?

I've read papers which contain statements such as "control of gene expression is critical in biological processes". How exactly does one quantify "gene expression"? Isn't gene expression an umbrella ...
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Methods for varying insert size in E. coli clones

I'm writing my master's thesis proposal, and I need to improve the solution-behavior of some truncated protein domains which have previously shown poor solubility when expressed in E. coli. To ...
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Population size and genetic drift - What are the evidences?

Wright-Fisher model From the Wright-Fisher model of genetic drift, the random sampling of allele from one generation to the next is taken from a binomial distribution with parameters $2N$ and $p$, ...
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Why does meiotic recombination disrupt the independent assortment of genes on the same chromosome?

There are many sources that say that genes that are "linked" by being on the same chromosome assort with each other -- that when an allele is passed on that the gamete containing said allele will also ...
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2answers
55 views

Which strand of a gene specifies a protein? [closed]

A gene is a segment of DNA (I hope double stranded) and each strand when transcribed form a mRNA and after being translated a protein. As from each gene there are two proteins that are being formed. ...
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Can a Turner syndrome patient develop male characteristics artificially?

From an answer to the question Can stem cells from male convert to cells of female-only organs, and vice versa? Y chromosome is the sex determining chromosome with SRY gene that determines testes ...
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Why is a heritability coefficient not an index of “how genetic” something is?

On his blog, Eric Turkheimer writes: [T]aken as a number, a unit of analysis, heritability coefficients are funny things to aggregate on such a massive level. What exactly are we supposed to ...
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Can I figure out the identity of my grandparent from this information? [closed]

I know all my family up to my grandparents, with the exception of the grandfather on my mother's side. At the time my mother was conceived, my grandmother was having an affair so no one in my family ...
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Can the restless leg syndrome may have been caused due to natural selection? [closed]

Disclaimer: I don't know how much restless the leg has to be, in order to be considered a syndrome. RLS runs not only in my family but also several people in the locality. My hypothesis is that RLS ...
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2answers
106 views

Why do some animals try to imitate other animals?

There is a tendency of some animals (including people!) to be "copy-cats" and try to imitate members of their own, and sometimes other, species. The most obvious example is a parrot copying human ...
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Directed evolution: Point mutation vs Insertion-Deletion vs Shuffling

When attempting enzyme function improvement via Directed Evolution I can see three different strategies to generating variation for the gene sequence: Point mutations Insertion / Deletions Shuffling ...
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3answers
85 views

Relationship of the DNA of a eukaryotic gene to the 5'-UTR of its mRNA

In eukaryote pre-mRNA I am having a little trouble grasping exactly what the 5 prime untranslated region is defined as. It seems that it could be defined as the difference in pre-mRNA between the ...
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Is there a way to identify a species of tree?

My family has been passing down seeds from a lemon tree for about 3 generations now, There is some controversy about its origin or species. The lemons look like tangerines and when cut the pulp is ...
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1answer
59 views

Pink Grasshoppers

The area I found this grasshopper was Canyon Country, California, USA In a desert/field area. I have been reading up on grasshoppers because I recently came into possession of a pink grasshopper (It ...
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What's the difference between shotgun sequencing and clone based sequencing?

In a lecture during my undergraduate degree we were introduced to the race to complete the human genome. Celera were competing with Sanger and collaborators to sequence the human genome. Celera ...
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Data on Gene Position in Human Genome

I am trying to get some data on gene position in the human genome and I need some help What I tried I downloaded ...