Albino parents but normal fry =/
- Thread starter daviidimo
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Chances are they are not purebred albinos.
If you xbreed an albino and a a normal pleco you will get a mix of albino and normal fry. But even the albino looking ones carry the normal and the albino gene, when you breed those the normal gene is dominant and the albino gene is recessive.
The fry you have will still carry the albino gene, but it's masked by the normal one. If you breed the next generation you will probably get some albino fry again.
Another possibility is that you have one albino and one amelanistic. Those look like albino, but don't have red eyes. A different gene mutation and their xbred offspring may revert back to normal, but still carry the recessive genes, that can re-appear in later generations.
Ian
If you xbreed an albino and a a normal pleco you will get a mix of albino and normal fry. But even the albino looking ones carry the normal and the albino gene, when you breed those the normal gene is dominant and the albino gene is recessive.
The fry you have will still carry the albino gene, but it's masked by the normal one. If you breed the next generation you will probably get some albino fry again.
Another possibility is that you have one albino and one amelanistic. Those look like albino, but don't have red eyes. A different gene mutation and their xbred offspring may revert back to normal, but still carry the recessive genes, that can re-appear in later generations.
Ian
Ian,
your first synopsis is wrong.
Only if the so called normal pleco is a cross bred normal x albino is this possible, but then its not a normal pleco. Albino's are double recessive. Two double recesive parents cannot carry the brown gene.
Two true albinos should produce albino fry, just like two blue eyed humans will have blue eyed kids.
your first synopsis is wrong.
Only if the so called normal pleco is a cross bred normal x albino is this possible, but then its not a normal pleco. Albino's are double recessive. Two double recesive parents cannot carry the brown gene.
Two true albinos should produce albino fry, just like two blue eyed humans will have blue eyed kids.
This is not necessarily true, both my parents are blue eyed and my sister has brown eyes. Genetics is a funny thing and although two parents may have a double recessive gene there still is the possibility that they carry the gene for a more dominant color.
GuppyGirl1230
Snails, Guppies and Corys, OH MY!!!
petluvr is right- there is still a chance if both parents have the recessive gene. If you lay it out, this is how it goes:
A-Albino dominant
a-Albino recessive
B-Common dominant
b-common recessive
You have the potential for any of these combos in each pleco- AA, Aa, AB, Ab, BB, Bb, aa, bb, ab, aB
It sounds like your plecos are aB, both parents are albino, but carry the dominant Common gene. aB and aB has a 25% chance of aa or BB, but a 50% change of aB. Since the B is dominant, it can express as the common brown color. It can also be aa, but that is much less common. The Dominant allele will alway try to express.
Maribeth
A-Albino dominant
a-Albino recessive
B-Common dominant
b-common recessive
You have the potential for any of these combos in each pleco- AA, Aa, AB, Ab, BB, Bb, aa, bb, ab, aB
It sounds like your plecos are aB, both parents are albino, but carry the dominant Common gene. aB and aB has a 25% chance of aa or BB, but a 50% change of aB. Since the B is dominant, it can express as the common brown color. It can also be aa, but that is much less common. The Dominant allele will alway try to express.
Maribeth
Yes my example was an over simplification...
But to get albinos to breed true they need to be pure bred for many generations. If they are not pure genetic albinos, then all sorts of weird things happen in their offspring. Like normal coloured offspring that may carry the albino gene as a recessive.
The OP has 2 albino fish that produced non-albino fry. That was just a possible explanation of why.
Want weird genetics?
http://urbanlegends.about.com/library/bl_black_and_white_twins.htm
Want to guess what colour babies those kids will have?? :grinyes:
Beats me, but bet it will be interesting from a genetics point of view, depending on who they marry.
Ian
But to get albinos to breed true they need to be pure bred for many generations. If they are not pure genetic albinos, then all sorts of weird things happen in their offspring. Like normal coloured offspring that may carry the albino gene as a recessive.
The OP has 2 albino fish that produced non-albino fry. That was just a possible explanation of why.
Want weird genetics?
http://urbanlegends.about.com/library/bl_black_and_white_twins.htm
Want to guess what colour babies those kids will have?? :grinyes:
Beats me, but bet it will be interesting from a genetics point of view, depending on who they marry.
Ian
Sorry, I don't agree. I think you are getting yellow BN's confused with albino's through LFS misidentity. L-144's (blue eyes) I do not believe are true albino's.
However, after I looked into it a bit, Albinism is caused by a mutation in one of several different genes that go into a several step process of making melanin. So a disruption in any of of these steps could lead to albinism. So if one of the parents was a type A albino and the other a type two albino, it is feasable to throw brown offspring.
I am not quite sure what guppy girl is trying to explain, I have never seen genetics illustrated quite that way.
However, after I looked into it a bit, Albinism is caused by a mutation in one of several different genes that go into a several step process of making melanin. So a disruption in any of of these steps could lead to albinism. So if one of the parents was a type A albino and the other a type two albino, it is feasable to throw brown offspring.
I am not quite sure what guppy girl is trying to explain, I have never seen genetics illustrated quite that way.
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I thought albino gene(s) were always recessive, from what I recall of genetics. Is it different for fish?