All Questions
Tagged with inheritance or genetics
371 questions with no upvoted or accepted answers
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Can there be traits which aren't possible objects of selection, e.g. beneath a "threshold of genetic noise"?
Is it possible that there are traits that might not be possible objects of the selection because of highly sensitive dependence on genotypes? The context of my thought came when I was having a ...
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Is it true that if a human lived long enough (up to 3-400 years), he/she would eventually develop cancer?
I have just studied DNA, but I am not so clear. So, I would like you to explain it more clearly.
This is what I think when a human grow older and older, his or her DNA repair mechanism would be ...
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Frameshift Mutation
With regards to LMNA frameshift mutations further downstream in the tail region, specifically (p.Arg455Gln fs*5) which has yet to be found/recorded in any medical literature...Does anyone have any ...
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Why is sickle cell trait expressed in half of all cells rather than all cells containing half-sickled haemoglobin
If sickle cell trait is due to be heterozygous with respect to a single gene mutation on the haemoglobin β-globin chain, why is it the case that ~50% of RBCs are sickled rather than half of the ...
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The First Polymerase
Knowing that polymerase protein is needed for the transcription of genes, which polymerase is used in the transcription of polymerase protein itself?
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Dihybrid cross question
An experiment is set up to study two genes. The two genes assort independently and for each gene the expression of alleles involves complete dominance. In the genetic cross RrTt x RrTt, a number of ...
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Lac Operon and Arabinose Operon
In the lower concentration of glucose, what among lactose and arabinose, when both are present in the growth medium, is more likely to be utilized by E. coli?
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Simple Autosomal Recessive question by a novice genetics student
How do you figure the percentage of offspring that will be a carrier of an Autosomal Recessive gene when the FATHER is the recessive carrier and the MOTHER is not affected (normal, no recessive)? ...
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Behaviour of chromosomes and genes
I recently read a comparison between behaviour of chromosomes and genes - which had two statements understated -
Independent pairs segregate independently of each other
One pair segregates ...
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How does selection affect allele frequency?
Question
People who are carriers for Blooms Syndrome have developed a selective
advantage. How would this affect the allele frequency of the disease allele?
My thoughts
Natural selection will ...
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Why can't the mutation for this simple pedigree be X-linked recessive?
http://ocw.mit.edu/courses/biology/7-012-introduction-to-biology-fall-2004/exams/finalprac.pdf
For question 7a on pages 10-11 of the above link, why can't the mutation be X-linked recessive?
The ...
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Gene transfer between Gram positive and Gram negative bacteria?
How does transfer of genetic material occur between Gram positive and Gram negative bacteria?
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Can Females Songbirds Have Male Plumage?
Male birds are colorful for courtship displays, females are dull for camouflage. But, is written in a website somewhere that sometimes, when females birds are sterile, they grow male plumage due to ...
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Proteins in different organisms
I know that DNA is universal meaning that all organisms have the same 4 base pairs and also that the same codons code for the same amino acid in all organisms. What I am wondering is that say humans ...
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2
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Question about probability of being a heterozygous carrier
A 26-year-old woman of Norwegian descent seeks genetic counseling. Her brother died at age eight of documented cystic fibrosis. Both of their parents are deceased. The woman undergoes DNA testing for ...
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DNA and Genes, which consists of which? It seems that the hot answer on quora is different to the nih post
This quora's answer has got 8.3k views and 20 Upvoters.
"Genes are a part of the DNA."
per nih, "Genes are made up of DNA, which is telling the truth."
in my understanding, the quora version ...
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is it possible for a son to inherit an allele on a Y chromosome?
Obviously, the only way for one to be male is to inherit the Y chromosome, but are there alleles on the y chromosomes? Or is it just automatically the recessive trait without an allele.
user51502
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x-linked recessive inheritance and correlation for males
I was inspired by a discussion in this thread. Wikipedia lists a number of disorders linked to recessive genes on the x-chromosome. One typical example is red-green color blindness. Now wikipedia says ...
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Recombination frequency
From Campbell Biology 2017, unit 15, test your understanding question 5:
Using the information from problem 4, scientists do a further testcross using a heterozygote for height and nose morphology. ...
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In Genetic Engineering, why are we limited to existing creatures when it comes to creating a new species?
So, I don't know much about Biology. Haven't studied it since high school. So please excuse me if my science isn't proper. I'll do my best.
Let's say for example you wanted to make a fire breathing ...
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Why is the size of the human penis not in proportion to that of the rest of the body?
According to this research
https://qph.fs.quoracdn.net/main-qimg-2ffcc3b19663af67c96ac1be8f3d6351-c
it is more likely for tall men to have large penis
but there are still many tall not having large
...
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