Brown And Albino

[5teady_2012]

My common brown BN has spawned with my albino female and the eggs have hacthed and the fry been released from cave, they all seem to be browns, is this normal or should some of them be albino? which is more dominant?


Thanks.

 

[Colin_T]

brown is dominant over albino
the young will all carry the albino gene but unless they are crossed with an albino, they will only produce brown young.
If you cross two of the young albinoxbrown fish then some of their young will be brown and some will be albino.

 

[5teady_2012]

brown is dominant over albino
the young will all carry the albino gene but unless they are crossed with an albino, they will only produce brown young.
If you cross two of the young albinoxbrown fish then some of their young will be brown and some will be albino.

Thanks for that colin

 

[Egmel]

brown is dominant over albino
the young will all carry the albino gene but unless they are crossed with an albino, they will only produce brown young.
If you cross two of the young albinoxbrown fish then some of their young will be brown and some will be albino.

Thanks for that colin

Sounds like your Brown doesn't carry the Albino gene (else you were the watcher of a statistical fluke!)

As Colin says if you breed the young you should expect to see some albinos.

On the subject...

I know the problems of inbreeding are less pronounced with fish than the are with mammals but at what point should you introduce new blood? (Obviously if the original couple in this case were not genetically related then there wouldn't be any issues, but what if they were brother and sister?)

Also is the hand over 50-50, ie would you expect the ratios of a BxA mated with a BxA to be 1/4 BxB, 1/2 BxA and 1/4 AxA?

(spot the one who gave up biology at GCSE!)