Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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

0
votes
0answers
22 views

Mathematical book references

I study mathematics at the graduate level (mostly pure) and was wondering if there are good books on the topics of genetics, evolution, ecology, or just general biology that treat these subjects under ...
0
votes
0answers
6 views

Is the allopolyploid cotton a fixed heterozygote?

I have been reading some scientific papers (with dubious comprehension of the material) about cotton. They say cotton is a allopolyploid and that it is thought to result from a genome doubling of a ...
-1
votes
0answers
19 views

peeled off poplar and almond rods in water for flock that mate to give birth to speckled & spotted sheep & goats

Could someone please give scientific reasoning as to why peeled off poplar and almond rods in water drank by flock that mate would give birth to speckled & spotted sheep & goats? ** Genesis :...
-2
votes
0answers
17 views

Least percentage of humans who cannot become any superhero [on hold]

Hulk, Blackwidow, ProfessorX, and Juggernaut are four mutant humans with powers arising out of genes H, B, X and J respectively. All humans can express all of these genes with the right transcription ...
-2
votes
1answer
32 views

Codons at for transcription vs translation

Why are start and stop codons present at translation level but not at transcription level? And how will I obtain a protein at transcription level? Thanks in advance
2
votes
0answers
11 views

Honeybee relatedness: workers and nephews

This is my first question on this site. If anyone could help me get to the bottom of it, I would be very grateful. I am currently working on a lecture on kinship in animals. It goes without saying, ...
3
votes
2answers
89 views

Is it possible that there are two people in the world who belong to a different species? [duplicate]

There're over 7 billion people in the world and every one of them is different from everyone else. Is it possible that there are two people so different that they belong to different species (in the ...
0
votes
1answer
29 views

Why is DNA polymerase added at the end of PCR reaction?

PCR reaction is used to amplify DNA fragment. Each reaction requires a DNA template, buffer, dNTP mix and a unique pair of primers, one ''forward'' primer and one ''reverse'' primer. The DNA ...
-1
votes
2answers
30 views

Two factor crosses [on hold]

a purebred wingless red-eyed fruit fly is crossed with a purebred winged sepia eyed fruit fly to produce F1 flies. The F1 flies are crossed to produce F2 flies. What is the phenotypic ratio of the F2 ...
-2
votes
0answers
35 views

Can you Gene Splice Mice to have Alpaca fur? [on hold]

I am honestly just curious about this. Is it possible to replace a mouse's fur genes with the an Alpaca's fur genes so the mouse then has Alpaca fur? Thanks in advance!
0
votes
0answers
24 views

Is genetic imaging usually considered as physiological measurement?

I think that since genetic determine the physiology of a person, it should be considered as a physiological measure. But what is the convention in academia? (i.e. if someone want to talk about ...
2
votes
0answers
17 views

Is gut bacteria Succinivibrionaceae's low methanogenesis understood well enough for GM of cattle gut bacteria to be considered?

After watching the Periodic Table of Videos episode linked in this question I watched the episode Wallabies and Methane where Sir Poliakoff says (a bit after 02:00):...
-1
votes
0answers
16 views

What is the relationship between heredity and genetics? [closed]

How we will relate heredity and genetics and the relationship between both of them?
0
votes
1answer
12 views

How exactly does heterozygous sickle trait help patients survive malaria

Heterozygous sickle cell anaemia trait is known to increase the survival rate of carriers to malaria attacks. How does a recessive gene not expressed in the phenotype allow for such an advantage? Is ...
0
votes
1answer
21 views

Transcription of Multiple RNAs on One Section of DNA in Eukaryotes

When RNA Polymerase moves along the template strand it bind to the promoter and moves along in a 3'-5' fashion on the template strand. Can RNA Polymerase also move along the coding strand of this ...
-1
votes
1answer
31 views

Are modern gene-editing techniques capable of creating genetically-superior versions of humans? [on hold]

Can we alter the DNA in, say, a small-framed, low muscle mass male to those of elite bodybuilders? Can we alter the DNA sequence that stops balding and hair loss? How about the genes responsible for ...
3
votes
0answers
31 views

Relationship between inbreeding and sterility in humans

In general, inbred individuals tend to be at increased risk of sterility as shown in cows (Gonzales-Recio, 2007) or in leghorns (Nordskog and Cheng, 1988) for examples. I only have very quickly looked ...
1
vote
0answers
11 views

Fluoroquinolone mitochondrial and genomic DNA adduct

What could be possible consequences of covalent bond mitochondrial and genomic DNA adduct by Fluoroquinolones, our study was done by Fluoroquinolone Toxicity Study NFP. All 50+ participates who took ...
1
vote
1answer
20 views

How do you write genotypic and phenotypic ratios?

If two homozygous recessive parents are crossed, I know that all of the offspring will be homozygous recessive as well. Would you write the genotypic ratio as 0:0:4 then and the phenotypic as 0:4? (...
0
votes
1answer
19 views

Determining Viral Shift vs Drift using RT-PCR [closed]

How would you determine whether a virus has undergone viral shift vs viral drift using RT-PCR? What would your gel actually look like? In this problem we are given certain materials: reverse ...
1
vote
1answer
52 views

Why is a hippo so big if it has round about the same genes as a mouse

My science teacher told us that all mammals have round about the same number of genes. This confuses me, since there are very big and very small mammals. Where do genes come from and why do animals ...
-2
votes
1answer
29 views

Are androgenic-anabolic steroids a form of gene editing?

Is taking AAS a form of gene-editing? Steroids alter genes in some way since they allow people to build more muscle than what's naturally possible -- so they sort of "break" natural genetics somehow. ...
0
votes
0answers
52 views

What is the biological reason behind homosexuality?

I am a medical student and know basic genetics and evolutionary stuff. What makes a person homosexual or heterosexual? Is it sex hormones mediated? Is it hereditary?
1
vote
0answers
26 views

Does every protein encoding gene necessarily have a transcription factor?

For instance, transcription factor gene A is responsible for activating gene B that encodes protein 1. However, it is possible for genes like gene B to encode proteins without having transcription ...
0
votes
0answers
34 views

Is horse skin colour a continuous or discontinuous variation? [closed]

Also state the reason as to why it might be either of those.
1
vote
2answers
31 views

Hemoglobin question- how many alleles?

So I know that Hemoglobin is made of 2 alpha and 2 beta subunits. The alpha consists of 2 genes on chromosome 16, and the beta of 1 gene on chromosome 11. So why does Hemoglobin only have 4 alleles? ...
0
votes
1answer
54 views

Does the deletion of Chromosome 20 cause immunity against prion disease?

I was reading recently about prion disease and it caught my attention that a normal prion protein is coded n chromosome 20, therefore, in order for an infectious prion protein to attack, there must be ...
0
votes
0answers
10 views

Agrobacterium tumefaciens risks vs effectiveness

Are there genes in Agrobacterium that are analogous to lacZ found in enteric bacteria, and if so what genes are they. Does A. tumefaciens have orthologs for starch and glucose use? How risky is ...
0
votes
0answers
47 views

Demonstrate epigenetic effect at home

These days the popular science news often reports about epigenetic effects. Thus I learned that the simplified picture that we were taught in school, i.e. that no acquired traits are heritable, is not ...
0
votes
0answers
17 views

How is sex determined for drosophilia flies?

I am confused on Drosophilia sex determination. Here is what I understand: The X chromosome has the sxl gene. Flies with 2 X chromosomes are able to produce ...
1
vote
0answers
31 views

Monohybrid Recombinant Frequency? (three point Gene Linkage)

I am curious to know if it is completely impossible calculate recombinant frequency for monohybrids ( three point link, gene map etc.) Here is an example: Marker 1 xx= 25 xy=100 yy= 20 Marker 2 ...
0
votes
2answers
55 views

You need DNA to make RNA, and RNA to make DNA, so they had to come into existence at the same time?

A statement I recently read: 'Evolution is debunked and gives no basis for morality. Natural Selection throws away info, it does not add. You need DNA to make RNA, and RNA to make DNA, so they had to ...
2
votes
1answer
25 views

Linkage between chromosomal loci and the Hardy-Weinberg principle

Referring to the Hardy-Weinberg principle, which is always stated with respect to a particular locus on the chromosome, if we observe that two different loci are either always together in Hardy-...
0
votes
0answers
38 views

Do flower ovules contain haploid or diploid genetic material?

Are the ovules in flowers haploid or diploid? When I look this up online I get some crazy scientific answer that is impossible to understand and all I need is "Haploid or diploid".
2
votes
3answers
44 views

Why is the mechanism of inheritance for this disease autosomal dominant?

An unrelated couple has a daughter and a son with the same rare condition. Neither parent has any obvious signs of the condition, but the father's mother (paternal grandmother) and her brother have ...
1
vote
1answer
19 views

Genotype -/- vs delta/delta

In https://doi.org/10.1016/j.neuron.2018.07.033, Pan et al. use the designation TMC1^delta/delta to describe a mouse strain lacking a functional TMC1 gene. What if any is the different between the ...
2
votes
2answers
55 views

Where does reverse transcriptase come from?

I can't figure out whether the viruses provide reverse transcriptase, or their RNA has the code for it, or the host cell normally contains it. Multiple sources just introduce the enzyme without ...
1
vote
1answer
33 views

How many birds in this population would be expected to have either red or white feathers?

Question: The red and white feather pattern of a bird is determined by a gene that has two alleles, band R and W,which show codominance. Some birds have completely red feathers (RR),some parrots ...
19
votes
4answers
3k views

Are mutations a source of genetic variation?

Here is a question from the book SAT II Success Biology E/M (where the SAT is the exam taken by the American high school students): Which of the following statements is true about mutations? (A) ...
0
votes
1answer
47 views

Why does this genetic pedigree show an autosomal dominant allele at one generation but not another?

Questions 186-188 of the GRE Biology Practice Test are prefaced with this genetic pedigree: Questions 186-188 refer to the following pedigree for the inheritance of a very rare human disease over ...
0
votes
0answers
17 views

What would the family tree look like

If a son has a baby with his mother, how would the child's family tree be arranged? would the child show that he is the mother's grandchild or son? Sound twisted I know, but I must ask...
0
votes
0answers
15 views

Ratio PD:NPD:TT in tetrad analysis

In tetrad anlysis in yeast it is often used that if two genes are unlinked and far from centromere, the expected PD:NPD:TT ratio is 1:1:4, i.e. we are getting PD and NPD each with probablity 1/6 and ...
3
votes
2answers
39 views

Genetic analysis of one sibling relevant to other

My sister, my only sibling and I have literally no physical traits in common. Whatever trait I inherited from one parent she inherited from the other. We're thinking of using one of those genome ...
0
votes
1answer
59 views

How to find which mutation in a protein is related to a disease?

I have the FGFR3 protein in UniProt and they ask me to find which of the following four mutations is related to a disease: N98F, P64K, T79S, or F384L. Where can I find such information? Thanks
0
votes
0answers
3 views

Looking for a dsRNA GFP plasmid to conduct an siRNA experiment with C. elegans in a genetics course

I'm teaching a new genetics course, and would like to expose my students to some siRNA experiments. I decided to use C. elegans instead of Drosophila to introduce them to a newer model organism, and ...
0
votes
1answer
55 views

How can two biological sequences be anything but homologous?

If we consider homology between two nucleotide sequences as a yes/no answer to whether they have shared a common ancestral sequence, then given that all life share common ancestry and sequences are ...
0
votes
1answer
16 views

Genes related to senses and their variation across animals

Animals often have very different numbers of active genes related to any sense. For instance, most fish or even aquatic mammals have very few olfactory receptor genes, whereas this is higher in ...
0
votes
0answers
11 views

Meting temperature of PCR products and product expected size

I know the Melting temperature of my primers but I would like to know if the melting temperature of my product match with the melting temperature I get in the melting curve when doing a qPCR, in order ...
1
vote
1answer
27 views

What does “novel, predicted deleterious, within autozygome” mean in genetics?

I am a medical student and just got involved with a genetic lab and research. I read a lot phrases like: "Although no mutations have been reported in this gene, we think this variant is interesting ...
0
votes
0answers
24 views

PCR with multiple primers (at same locus)

Does anyone know if its possible to perform a PCR with multiple primers in one run? Usually I have to do two PCRs where the product of the first PCR is used as a template of the second. I couldn't ...