I think I mosty understand basic gentics now, I just have a few question... I might have asked one or two alreadt, just making sure..

 

1. only dominant varietys can be single or double factor correct?

2. Only males can be split for sex-linked recesive mutations right?

3. Recessive Genes only show when both parents are split for recessive or if female is recessive and male is split for recessive?

4. You can only get sex-linked cocks if both parents have the same sex-linked mutation or if you have a sex-linked hen and a cock thats split to the same sex-linked mutation.

 

 

those are all qustion that i hav for now..

I appreciate the help :rip:

1. Yes

2. yes

3. NO recessive genes show only when the bird carrys 2 recessive genes if they only had 1 then the other dominant gene would mask the recessive mutation. If the parents are both carrying the recessive gene of say blue then you would have blue babies but if both parents where greens and not split you would never have blue babies.

4. Yes

 

:rip:

for number three, what if there is no dominant gene?

 

a few more questiosn..

5. males can be split for a recessive gene right(not sex-linked recessive)????

6. What is the chance of getting a sex linked baby if for example the female is albino(sex-linked) and the male a blue recessive pied(recessive)??

7. And what about sex-linked and dominant???

Edited May 1, 200718 yr by Marlony

All recessives genes have a gene that is dominant over them, Green is dominant to Blue. A normal, non pied bird is dominant to recessive pied. Both parents of a recessive coloured bird must have shown or carried the recessive gene. Any sex bird can be split for a recessive gene.

 

Green X Green = All Green

Green X Green/Blue = 50% Green | 50% Green/Blue

Green/Blue X Green/Blue = 25% Blue | 50% Green/Blue | 25% Green

Blue X Green/Blue = 50% Blue | 50% Green/Blue

Blue X Green = All Green/Blue

Blue X Blue = All Blue

 

I think that might help? :rip:

Edited May 1, 200718 yr by ellulah

that helps a lot thanks. what about 6 and 7??

 

so only if both parents have one recessive gene chics can be recessive??

what is both birds are blue and one is recessive pied the other one dilue, the chick wont have either one right?

Edited May 1, 200718 yr by Marlony

5. males can be split for a recessive gene right(not sex-linked recessive)???? ** they can be split for both, hens can not be split for a sex-linked but they can a recessive gene

 

6. What is the chance of getting a sex linked baby if for example the female is albino(sex-linked) and the male a blue recessive pied(recessive)?? You will get no visual albinos, and the hen will give the ino gene to the male and he will be split for it because he needs to 2 ino genes (1 from each parent) to be an ino male.

 

7. And what about sex-linked and dominant??? What about it 2 different genes and they act in 2 different ways. So if you are asking can a bird be a sex-linked mutation and dominant mutation and show it visually the answer is yes. You can have an opaline dominant pied (example)

Edited May 1, 200718 yr by Elly

thanks so much guys.

for number three, what if there is no dominant gene? then the recessive gene will one show, but you need 2 recessive genes to show the mutation so if there is no dominant gene present that means the bird has 2 recessive genes. Example: 2 blues genes (they are both recessive) or 2 recessive pied genes

thanks so much guys. so you need two sex-linked recessive genes to actually have a visual budgie that has the sex-linked gene?

A hen only needs 1 sex-linked gene since she can not mask she has xy genes so she only has 1 x gene which carried the actual sex linked mutation.

 

A male has xx so he will need 2 sex-linked genes to express the sex-linked gene.

 

For those who say xy is boy and xx is girl that is correct in human genetics but not bird genetics (I know odd).

 

Hope that answers your question.

okay, i think i get it!!

can a budgie be split for a dominant gene?

 

im still having little trouble with the sex-linked mutations...

so male is xx and girl xy. Y is the sex-linked genes so for a male, two sex-linked genes will mask xx so you get yy????? ANd for a female you only need one Y(sex-linked gene) because you already have one Y. So you always need two Ys for a visual sex-linked mutation.

 

 

 

 

am i completely wrong???

Edited May 2, 200718 yr by Marlony

They can be a single factor meaning they are carrying 1 dominant gene or a double factor meaning they are carrying 2 double factor genes.

 

x is the gene that is carrying the mutation

 

xx is a boy, they need 2 sex linked genes of the same type to be visble. Which means they need to get an x from the hen and an x from the male of the same mutation say abino to show the mutation to our eyes.

 

xy is a girl, they only need one sex linked gene for the mutation to be visible. y doesn't carry any genes and doesn't mask any genes it simply makes a female a female in budgies (not humans)

Go here, near the bottom of the page is a section on sex-linked traits. Its about humans (hemophilia) but if you swap the sexes around it should help you understand.

 

LINK

Edited May 2, 200718 yr by ellulah

To answer your first question. no a bird can not be split for a dominant gene.

 

They can carry recessive genes and be split to sex linked.

okay thanks.

so since a budgie can carry two dominant genes, can they be diffrent?

Yes your dominants are green (over blue), Grey, Spangles, Dominant Pieds, Yellowfaces (in the blue series)

 

So you can have a Dominant Pied Spangle for example. But they will show them. Unless there is a masking gene such as ino.

 

Recessive Genes include. Greywings, Clearwings, Yellows, Whites , Recessive Pieds, Dark-eyed Clears, English Fallows and Crests.

 

Your birds can be split for any of these genes.

Yes If they don't affect the same area of the body (dominant pied spangle for example)

and 3 dominant genes??

so if the budgie has clearwing and greywing you just wouldnt see clearwing or thats cant happen?

that can not happen because it is on the same allele it is either one or the other but they can be a recessive pied greywing (I believe right Nerwen)

I know Opaline is a sex linked gene - but where does it fall in the recessive/Dominant world?

 

I am assuming it is a recessive gene, but I wanted to be sure Im getting all this.

It doesn't it is considered sex-linked so it is neither recessive or dominant. If the hen has a sex linked gene she can't mask it at all because she only has 1 x the y carries no mutation on it.

 

A bird can be Spangle (not sex-linked but dominant gene) and Opaline (a sex-linked gene) along with Cinnamon (a sex-linked gene). You can have a Spangle Opaline Cinnamon.

 

I hope that makes sense.

so sexlinked mutations go onto the allees x and y but where do dominant and recessive mutations go then?

there is no sex linked genes on y only x

they would go on other chromoses that are not part of making the the sex of the bird such as xy

so guys can only have one sex-linked gene? And females 2?

Edited May 4, 200718 yr by Marlony