hey guys i am still kinda new to the whole snake keeping thing..(still dont have one yet) im having alot of problems trying to pick which one and color i want.. anyway can someone tell me what het means? i saw this corn snake and it was butter het/ moltey or something like that..?
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het?
- Thread starter wliob
- Start date
James673
New member
Het is short for heterozygous.
In the case of Butter het Motley, it means that the snake is homozygous for both amelanisitic and caramel genes creating a morph called Butter. The snake is heterozygous for the Motley pattern gene, meaning that the snake has a normal pattern. If bred with another snake carrying at least one copy of the motley gene, you may get offspring with the motley pattern.
There is a genetics tutorial written with corn snakes in mind here.
To make your search easier (or maybe harder) you can see pictures of more morphs at Ian's vivarium or at the Corn Snake Morph Gallery.
In the case of Butter het Motley, it means that the snake is homozygous for both amelanisitic and caramel genes creating a morph called Butter. The snake is heterozygous for the Motley pattern gene, meaning that the snake has a normal pattern. If bred with another snake carrying at least one copy of the motley gene, you may get offspring with the motley pattern.
There is a genetics tutorial written with corn snakes in mind here.
To make your search easier (or maybe harder) you can see pictures of more morphs at Ian's vivarium or at the Corn Snake Morph Gallery.
ratsncorns
Bird Nerd
Homozygous is something that is expressed. For example, a butter expresses the amelanistic gene and the caramel gene. If a person has brown eyes, it means that they are homozygous for brown eyes.
Heterozygous is something that is carried in the genes. Your butter carries the motley gene but does not express it, therefore will look like a normal patterned corn. If he is bred to another corn that is a motley or is a het for motley, some of their offspring will be motley.
Confused yet? :grin01:
Heterozygous is something that is carried in the genes. Your butter carries the motley gene but does not express it, therefore will look like a normal patterned corn. If he is bred to another corn that is a motley or is a het for motley, some of their offspring will be motley.
Confused yet? :grin01:
Homozygous and heterozygous have nothing to do with whether or not a gene is expressed.
Homozygous = the two genes in a gene pair are the same. Examples: two normal genes, two identical mutant genes
Heterozygous = the two genes in a gene pair are not the same. Examples: a normal gene and a mutant gene, two non-identical mutant genes
Most heterozygous gene pairs consist of a normal gene and a recessive mutant gene. In this case, the snake looks normal. But some heterozygous gene pairs consist of a normal gene and a dominant mutant gene or two non-identical mutant genes. In these cases, the mutant gene is expressed, and the snake does not look normal.
In the case of a butter het motley, the snake has a pair of amelanistic mutant genes, a pair of caramel mutant genes and a normal gene paired with a motley mutant gene. The amelanistic mutant genes prevent the formation of black pigment, and the caramel mutant genes change the orange-red pigment to more of a yellow color. The combination is a more-or-less butter color; hence the name.
As the motley mutant gene is recessive to the normal gene, a het motley does not show the motley pattern. However, if a het motley is mated to a motley or a het motley, some of the babies would have two motley mutant genes and show the motley pattern.
Hope that helps.
Homozygous = the two genes in a gene pair are the same. Examples: two normal genes, two identical mutant genes
Heterozygous = the two genes in a gene pair are not the same. Examples: a normal gene and a mutant gene, two non-identical mutant genes
Most heterozygous gene pairs consist of a normal gene and a recessive mutant gene. In this case, the snake looks normal. But some heterozygous gene pairs consist of a normal gene and a dominant mutant gene or two non-identical mutant genes. In these cases, the mutant gene is expressed, and the snake does not look normal.
In the case of a butter het motley, the snake has a pair of amelanistic mutant genes, a pair of caramel mutant genes and a normal gene paired with a motley mutant gene. The amelanistic mutant genes prevent the formation of black pigment, and the caramel mutant genes change the orange-red pigment to more of a yellow color. The combination is a more-or-less butter color; hence the name.
As the motley mutant gene is recessive to the normal gene, a het motley does not show the motley pattern. However, if a het motley is mated to a motley or a het motley, some of the babies would have two motley mutant genes and show the motley pattern.
Hope that helps.
ratsncorns
Bird Nerd
I was putting it in terms he would understand. I know how homo and hets work 
vetusvates
Gamaliel's Principle
In general, almost all (but not all) corn snake morphs are governed by straightforward Mendelian genetics, that can be explained in the simple terms of zygosity and the terms dominant/codominant/recessive.
Not all inheritance, in higher animals, can be explained so simply in the above 'either/or' terms. Which makes for interesting reading.
I'm ashamed to say own father has a bad case of the 'Morton's Toe'.
http://en.wikipedia.org/wiki/List_of_Mendelian_traits_in_humans
Not all inheritance, in higher animals, can be explained so simply in the above 'either/or' terms. Which makes for interesting reading.
I'm ashamed to say own father has a bad case of the 'Morton's Toe'.
http://en.wikipedia.org/wiki/List_of_Mendelian_traits_in_humans