498 Answered Questions for the topic genetics

Genetics

06/16/19

Does one parent transmit more DNA to the offspring than the other one?
Does one parent transmit more DNA to the offspring than the other one? Or do both parents always transmit the same amount of genetic material to their offspring?In other words, can a baby be... more
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06/16/19

Why are males more likely than females to have autism spectrum disorder?
The male to female ratio in autism spectrum disorder is around 4:1. However it seems ASD is not a simple X-linked disorder. Then how is it possible males are more susceptible than females, if the... more
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06/16/19

Why is the strength of genetic drift inversely proportional to the population size?
I saw a concept on the Internet that says "the strength of genetic drift is inversely proportional to the population size". I don't know why they are **inversely proportional**? Can somebody... more
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Genetics

06/15/19

What causes XYY Syndrome?
It's obvious how a misdisjunction can result in klinefelter's syndrome (XXY) but I don't see how this can result in XYY syndrome. Your parents have a collective total of only one Y chromosome so... more
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Genetics

06/15/19

What are the exceptions to Mendel's laws?
**What are the exceptions to the $-$** - Law of dominance - Law of independent assortment - Law of segregation**My knowledge:** *Exception of law of dominance:* - Incomplete dominance In... more
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06/14/19

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... more
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06/13/19

How do chromosome pairs get "paired up" for protein synthesis?
If my understanding is correct, during interphase a normal human cell will have 46 chromosomes scattered about in the cell nucleus. These chromosomes can be thought of as pairs: there are two... more
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06/13/19

Constant or variable number of chiasmata during recombination?
During recombination, is the number of chiasmata consistent for each gamete and are the chiasmata regions consistent within a single organism?
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Genetics Human Genome

06/12/19

What are the function(s) of Alu elements in the cell?
My 2008 biology book (1) states that some 10% of the human genome consists of relatively short (~300 nucleotides long) *Alu* elements which do not code for proteins but many of which are... more
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Genetics

06/11/19

Genetics Problems
In eukaryotes, transcription termination and polyadenylation are coupled. The key shared step is cleavage of the RNA trancript just 3' of the signal sequence. A) Describe what happens to the 5'... more
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Genetics Amino Acids

06/11/19

What is the smallest number of amino acids required for life?
Is there any hypothesis on the minimum number of amino acids required for life?
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Genetics Evolution

06/09/19

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... more
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Genetics Entomology

06/09/19

Why do ladybugs have a different number of points on their backs?
Everytime I see a ladybug I ask myself this question.Why does every ladybug have a different amount of points on its back? Is it because of its age? Or because of its genes? Is it inheritable?
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Genetics Hybridization

06/07/19

Why are hybrids infertile?
Let's take a quote from Wikipedia about zebroids.> Donkeys are closely related to zebras and both animals belong to the horse family. These zebra donkey hybrids are very rare. In South Africa,... more
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06/07/19

How was gene therapy able to cure diseases through the transformation of actively dividing cells?
I thought that gene therapy, when performed on target cells that regenerate themselves constantly, can be effective for a limited time only. I.e., the effect gradually wears off after a while,... more
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06/07/19

Why was it so hard to decode the corn genome?
My teachers growing up told me it was impossible to decode the maize genome. But yet its been done. Why was decoding the genome so significant, and what made it so difficult?
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Genetics Evolution

06/07/19

How can the number of genes increase through evolution?
I am aware of the basics of evolutionary theory, however I don't understand how mutations can add genes over time. Am I correct in thinking that creatures within the same species who mutate to have... more
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06/06/19

What are chemical candidates for replicator molecule?
I have read `Selfish gene` by Richard Dawkins and idea is that at random some molecule was synthesized that had a property if there is enough 'materials' to construct copy of itself - it would. And... more
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Genetics Cancer Pathology

06/05/19

Why do people with Down syndrome get fewer cancers?
I'm coming across some conflicting information regarding the correlation between cancer incidents and trisomy 21. I read a report from nature that discusses how Downs are only a tenth as likely to... more
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06/05/19

Out of the Cell: toward the ribosome

Which is the cellular organelle that has two parts: Big and Small?
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Genetics Mutations

06/05/19

Are there any mutagens that can undo the mutations they cause?
I was reading a section from my textbook about tautomeric shifts, and it seems to suggest that there are some mutagens that can be directly responsible for the phenomenon. The section is mainly... more
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06/04/19

Where do amino acids get attached to tRNA and where is it synthesized?
Some very basic parts of transcription/translation seem to be left out in various literature. I can't find the answer to this anywhere:How exactly is tRNA synthesized? I realize that mRNA is... more
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06/03/19

Why do people with type O blood have anti-A and anti-B antibodies?
People with type O blood have anti-A and anti-B antibodies, even without receiving a transfusion. Why?
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Genetics Dna Human Genome

06/01/19

Are there any DNA base sequences that are fully conserved between the genomes of all humans?
That is, they don't differ throughout the entire population. I understand of course that we can't DNA sequence every human, so by "fully" I mean there's an incredibly small probability of there... more
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06/01/19

Name for Fertile and Infertile Hybrid animals and Species Classifications.

If you have two distinct species of animals that are closely related, are they a Sub Species? Are they a Sub Species if they can breed and produce fertile offspring? What if they can not produce... more
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