Am I right about thi lingo?

[Sk3d]

Hey guys,

I was looking around at some gecko sales and I came across the terminology het. From the few Bio classes I took, I think I remember this term referring to heterozygous and I think that means that the animal has a recessive allele that may or may not show in the subject upon reaching maturity. In other words, a leo with a albino het of 50% chance has a one in two shot at being albino itself. Am I remembering all this correctly or am I completely missing the mark?

Thanks,
Sked

 

[BlakeDeffenbaugh]

Heterozygous means it has the genes or the possibility of having the genes. To get the Homozygous you need to breed either Homozygous to Homozygous, Homozygous to Heterozygous, or Het to Het.

The 50% means it was a 100%het bred to a normal female. A 100% het is produced by breeding a Homo male to a normal female.

The best way to understand recessive and dominant/co-dominant is to look up Ball Python genetics. There has been so many things written about the genetics on them that its pretty easy to find and figure out. The genetics work with all other animals its just easier to look up the Ball Python papers.

 

[Riverside Reptiles]

Hey guys,
In other words, a leo with a albino het of 50% chance has a one in two shot at being albino itself. Am I remembering all this correctly or am I completely missing the mark?

Thanks,
Sked

Close, but not quite. A Leo that's 50% het. albino would have a one in two chance of carrying the genetics for albino. But it would not display this trait.

 

[Skwerel]

Genetically speaking, heterozygous and homozygous are the terms that seem to be giving you confusion. Heterozygous means that the organism has two different alleles of the same gene, and homozygous means that the organism has the same two alleles of that gene.

To explain this, think of albanism. Albino is a mutation of the color gene, and is recessive. Therefore, to display albanism, the animal must have two copies of the recessive allele, one from each parent. Genes are generally assigned a letter, we will say for this it will be C. A big 'C' is normal color, and little 'c' is recessive. So an animal that has 'CC' will be homozygous with normal coloring, and animal that has 'cc' will be homozygous and display albanism, and an animal that has 'Cc' is heterozygous and will display normal coloring- but, this animal has a 50% chance of passing the recessive gene to it's offspring. If bred to a homozygous 'CC', all offspring will display normal coloring, if bred to 'cc', 75% of the offspring will be albino, and 25% will be heterozygous, and if bred to another homozygous, 25% will by homozygous albino, 25% homozygous normal, and 50% heterozygous.
Hope this helps :biggrin:

 

[Sk3d]

Alright, I do remember now. Thanks alot guys! It's been a few years since that class and it all got a little jumbled together.