genetics

[leamos]

Just curious, in childreni, is patternless dominent over pattern, or are they co dominent and u get a mixture of patterning through offspring

[Dutchy]

If i'm not mistaken pattern is dominant over patternless in that species.
But then again i'm not entirely sure.

I'd like to see a good answer on that question too.

[Sdaji]

The terms dominant and codominant refer to Mendelian traits. The patternless/patterned trait in Children's Pythons is not Mendelian, it is a continuous, quantitative trait which involves a large number of genes (and in some cases, some environmental influence). At some stage a mutation will probably turn up which will give us a Mendelian patternless allele/gene, potentially it could be dominant, codominant or recessive.

[Dutchy]

Nice explanation Sdaji , i only just don't know the term Mendelian, would you be so kind as to explain the term to me please.
( *feeling a bit noobish on the English terminoligy* )

Thanks in advance mate.

Greetz , Tom

[Sdaji]

Basically (I might end up oversimplifying), Mendelian traits are those which are controlled by just one gene and don't have strong environmental influences. There are two alleles of the gene and two copies of the gene in each individual, each copy can be either allele. Thus, you have three possible genotypes and two or three possible phenotypes (two phenotypes if it's a dominant/recessive trait, three if it's a codominant trait). Familiar examples are traits like albinism/wild type and wild type/jaguar/dead leucistic.

A familiar non Mendelian trait inherited in a similar way to Children's Python pattern is height in humans (although height in humans has a stronger environmental component). Another similar(ish) example is number of ventral scales in snakes (although when considered intraspecifically, again, with a stronger environmental influence).

Mendelian traits are discrete, Children's Python pattern is continuous (it can be anywhere in between boldly patterned and very close to literally patternless). Having said that, most discrete traits are not Mendelian. Many traits we talk about are Mendelian, because they're the easy ones to work with (and understand), but most traits are non Mendelian.

[Dutchy]

Thank you ever so much on explaining that term to me mate,
being Dutch has it's disadvantages in other languages so i just had to ask for that explanation.
Having read this it makes understanding your first story way more easy.
Thnx again ^__^

[Sdaji]

No worries Sounds like you've grasped the concept more quickly than most native English speakers

[Dutchy]

Well , i don't wanna blow my own horn but genetics was my favourite subject in bioligy .
But thank you very much for the compliment mate , appreciate it .

[Hix]

Originally Posted by Dutchy

Well , i don't wanna blow my own horn but genetics was my favourite subject in bioligy .

"You should always blow your own horn, lest someone mistakes it for a spitoon"

I've forgotten who said that, but I think it's worth remembering.



Hix

[Dutchy]

Hahaha, nice one Hix

Thanks for the support mate ^__^
The one who said that must not have been a very modest man has he ( or maybe a she ?? dunno , you ? )