What are mutants? 10 points for complete answer?

Question

Explain:
Auxotrophic mutants
Analogue resistant mutants
Revertants of non producing mutants
Revertants of auxotrophic mutants

My question is not related to any movie or so.....So stop giving those answers.
I want answer related to "strain improvement by mutant selection".

Answer 1

Mutants are organisms where there has been an alteration in the consensus DNA sequence of a given gene, regulatory region of a gene, etc. These nucleotide changes can lead to changes in the sequence of a given protein gene product that makes it incapable of performing its specific function, makes it degrade more quickly, and a host of other features. A mutation does not necessarily mean a change that leads to an alteration in a specific gene product. It could be a nucleotide change in one of the regulatory regions of a given gene that make it respond differently to its known regulator molecules, say a loss of steroid regulation of a steroid controlled gene as an example.

In the case of an auxotrophic mutant, what is typically thought of are simple organisms such as bacteria or yeast where we can test their ability to grow on culture media that has a limited number of nutrients. As an example, a mutation in the genes that encode any of the enzymes for leucine biosynthesis in a strain of yeast would now make that strain a "leucine auxotroph", i.e. it now needs added leucine in the growth medium for it to grow and survive. When an organism is isolated that is a "revertant" it means that it is derived from a parental strain that was originally incapable of growth without the addition of some compound to its growth medium, and the revertant strain has now developed a means to withstand this mutation and can grow without the addition of that substance to the medium. In some cases this happens because of a mutation somewhere else in the same gene that allows the organism to overcome the original mutation, in other cases there might have been changes in the binding and recognition region of a tRNA anti-codon that substitutes a different amino acid into that mutant site and corrects the defect a so-called "suppressor tRNA" mutant. There are a host of other ways for all of this to occur and I have only listed a couple. The full list is quite long.

Hope this helps.

Answer 2

A mutant is an individual who has a mutant allele of some gene, that is a defective version of the gene. In fact we are all mutants since it is very unlikely that all your one billion nucleotides were copied from your mother or father without error. So the term "mutant" is always used with respect to some specific gene.

"Strain improvement by mutant selection" works by breeding on those individuals that have beneficial mutations. Although most mutations are disadvantageous, some are beneficial. Sometimes, plant breeders radiate seeds in order to get more mutations so there is more to choose from.

Answer 3

I will give you sufficient explenation .
At the first Mutants is a word from mutation which me in genetic science that a change in the genetic material (DNA for human) occurs . But you have to note that there are many mutations in human genetic material occured due to the enviroment .
So Mutant organism or animal or human , have mutation in their genetic material done by the scientist for special purposes.

As I said this mutation done by scientist , and for the examples you asked about , some of them done for disease resistance , othres for producing Antibodies and so on .

Source ( Me) speciallized in biotechnology and genetic engineering, if you need more answers and explenation I would like to help u , so contact me or send email

Answer 4

well i think searchin wikipedia is cheating so here it goes what little knowledge i have about that, mutants are individuals of a certain species, that are'nt quite like the others, they are different geneticly, thid genetic alteration can either affect the apearence of such individual or not, but it is different, this genetic alteration could be caused by many factors, radiation, exposure to certain substances, xtrange environments... please note that i got out of scholl about 10 years ago and never again lifted a book about biology

Answer 5

i thot i knew wht were mutants until i read ur complete question!...
for me they are the characters in X-men movies...
seems like u know more...

Answer 6

mutants are a species which have undergone a radical transformation involving certain genes which are manually manipulated.

Answer 7

You go and watch X-Men 1,2 and 3 and you will understand.I don't want to explain it because its too long story.Emm...............10 point?

Answer 8

somthing that has either not enough chromosomes or too many chromosomes!

Answer 9

*shrugs* ignore that, go shopping