I am living in China have been breeding both red and blue eye both parents are long fins yet repeated my frys are 75% short and 25% long fin, since long fin gene are dominent can it be that at least one of the parent are short fins but have artificailly induce longfin perhaps by radiation. can any ...

I have bred longfin red and blue eye, all partent were long fin,yet the fry are only 20% longfin. if the long fin gene are recessive and there are two genes involves this should mean the avarage short fins from both partents longfins should be not more than 25% , yet I am consistently getting 75 ...