Reptile & Amphibian Forums

Just wondering, i hear the term Double Recessive thrown around in these forums a lot, i think i have some idea what it means but i may be way off. Could someone explain it please?

Thanks
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0.1 Bearded dragon
0.1 mexican kingsnake
1.0.2 Leopard Gecko's
0.0.1 Rose Hair Tarantula
1.0 BTS
0.0.1 Reverse Okeetee Corn
0.1 Bullmastiff
4.1 Cats

There is no such thing, there is a thing called "double het" though and that is when a gecko is het for two different things.

are you talking about a double recessive trait, like albanism(in which case type of albanism matters), in which the phenotype(the physical manifestation of genes) will only show the trait if the individual posses two of the ressicive genes. If they have one dominant and one recessive(called being heterozygous or het.) then they will have a normal phenotype but be able to pass the recessive gene on to there offspring.

Is that what you were asking?

i hope this helped
Ktulu

i think what he means is double het, which would mean the animal carries the genes for 2 traits, like when breeding a patternless to an albino, you'll get normal babies that are het for patternless an albino

albino is not a double recessive trait, if thats what you were even saying, a double recessive would be somthing like a blazing blizzard, or patternless albino
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Dan Quinn
Manhattan Herps

in terms of genes, albinism is a double recessive trait, as in you need to have two of the recessive genes in order for the phenotype to be albino. with the blazing blizzard or patternless albino you just have two double recessive traits that are being shown in the phenotype. Maybe thats what you mean by double recessive here but in genetics it is used to refer to have two of the recessive genes(homozygous recessive).