Selective breeding

[Katchit]

Hello; i am new to the forum.

 

I would like to ask you about selective breeding and the chances of producing a Taurus (bull) that displayed favourable traits and phenotypes of 2 selectively-picked cattle; thus to produce a better offspring as a result.

 

Taurus have 30 chromosome pairs; so what are the potential outcomes of the breeding?

 

How do favourable phenotypes become dominant? is that just a result of the phenotype being heterozygous dominant?

 

Am i correct in thinking that it is important to keep as many different phenotype combinations in genes as possible; as this allows for diversity within a species?!? if the potential phenotypic combinations were reduced; would this mean that the species would begin to look more and more alike with continued breeding?

 

Thank you for your time and help; much appreciated.

[lemur]

Hello; i am new to the forum.

 

I would like to ask you about selective breeding and the chances of producing a Taurus (bull) that displayed favourable traits and phenotypes of 2 selectively-picked cattle; thus to produce a better offspring as a result.

 

Taurus have 30 chromosome pairs; so what are the potential outcomes of the breeding?

 

How do favourable phenotypes become dominant? is that just a result of the phenotype being heterozygous dominant?

 

Am i correct in thinking that it is important to keep as many different phenotype combinations in genes as possible; as this allows for diversity within a species?!? if the potential phenotypic combinations were reduced; would this mean that the species would begin to look more and more alike with continued breeding?

 

Thank you for your time and help; much appreciated.

Idk, but couldn't progressive homogenization of genetic variation also result in more similar appearance? Like if you interbred as many breeds of dogs together as possible, wouldn't you eventually have dogs that appeared more like a single breed than multiple breeds? I think that selective breeding is typically geared at isolating certain characteristics, though, and that the result of this emphasis is that the phenotypical distinctions become subject to more attention, institutionalization as a specific breed with a name etc. That makes people who know the breed characteristics more likely to identify that particular breed-influence in a less breed-isolated individual. So, for example, if you are familiar with labrador retrievers you might look at a dog and see "some labrador" in the dog whereas if you were not familiar with some other breed of the dog's ancestors you would not have any basis for identifying that breed as contributing to the individual's appearance. Idk if any of this speaks to your issue but I always think it's worth considering the role that institutionalized cognition plays in any system of classifying things by appearance/aesthetics.

 

 

 

[Ringer]

Taurus have 30 chromosome pairs; so what are the potential outcomes of the breeding?

 

This is an extremely vague question. There are an innumerable potential outcomes, please be more specific.

 

How do favourable phenotypes become dominant? is that just a result of the phenotype being heterozygous dominant?

 

Favorable phenotypes are never necessarily dominant, some just happen to be dominant. Nor are recessive phenotypes necessarily bad.

 

Am i correct in thinking that it is important to keep as many different phenotype combinations in genes as possible; as this allows for diversity within a species?!? if the potential phenotypic combinations were reduced; would this mean that the species would begin to look more and more alike with continued breeding?

 

Yes, if a population were to lose it's genetic diversity the population would become stagnant. Think of extreme inbreeding.