Hi all,
The mama fish is my 2 year old BN Albino, and the papa fish is my 3 year old BN common...... But my question is with an albino mama, and common daddy, what can I expect this fry to look like? They are super small so it's hard to really know who they are gonna look like, but most of them look like albino's right now, and a few of them look just like Commons.
Because you have some albino fry, your male common BN is heterozygous for albinism. If a BN has one gene ("Allele" really) for normal colour (N) and one gene for albinism (n) it will be normal coloured ("wild type" or "type") because normal colouration is dominant.
You know your female is double recessive and homozygous (nn) because she is an albino.
There are several gene mutations that cause albinism in the Common Bristlenose, but both your male and female have the same albino gene, you know this because some of your fry are albino.
When the genes combine in your fry you have two possible options Nn (type coloured) and nn (albino). The ratio of Nn (type) to nn (albino) will be ~50:50%. (if fry get a male N gene they are heterozygous wild type coloured (Nn), if they get the male n they are homozygous albino (nn), because both female genes are recessive albino (n)).
However there are a few that look in between both.
I don't know about the genetics of the "calico" coloured variant of the common BN, but it looks like that might be involved as well.
Have a look on <"
Planetcatfish:Crossbreeding different...">.
cheers Darrel