fontanabound
145 posts
Dec 31, 2009
11:48 AM
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if i breed two rollers. the young are what precent of mom and dad? someone told me its not 50/50. thanks guys/gals in advance.
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wishiwon2
263 posts
Dec 31, 2009
12:33 PM
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How could they be anything other than 50/50?
The genetic contribution from each parent is exactly 50%. The young may resemble one parent more than another, but the make-up from each is absolutely one half.
Some species that have extended maternal care pick up some influence from thier mothers, behaviorally. Even then the genetic proportion is still 50:50.
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Jon
If it were easy, everybody would do it
Last Edited by on Dec 31, 2009 12:33 PM
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Sound Rollers
164 posts
Dec 31, 2009
12:35 PM
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If a roller shares genetics like us humans then it would inherit 50% mom and 50% dad. What's in that half is half of what's in her or his parents and so on. The roller has 80 chromosomes.
John
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Bill C
465 posts
Dec 31, 2009
7:27 PM
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Hi fontana, I dont agree with the other guys here. While they might be right I have to say that you could get genetics in the form of 25% / 75%or even 20% / 80% in fact you could also get 25% cock and 25 from the hen and 50% from the grand parrents also. The genetic genes that are passed down do not follow color or anything seen visible on the bird.( while body type and charactor are seen visible, genes are hidden to us )
I dont like to compare people with pigeons since they are no way the same but you can have siblings that favor the mom or dad or even an uncle and not the parrents.
It is a hit and miss with breeding rollers and when you get a click pair you have struck gold. Eveyone has to cross his family and find the ones that complemet each other. Even in a tight inbred family they have to pair this cock with that hen and try them out in the breeding pen. It can be a father and niece pair or cousin pair but the percentage of good birds is what most are after and some just that awsome champion that can come out of inbred or outcrossing.
This idea of 50 cock and 50 hen is also broken up in all of its off spring. Some get stabitity and some are too frequent or what ever. Out of 10 birds you are lucky to get three or four that are going to make it in the A team.
I have a friend that told me every bird he raised from a pair all made it in the A team. I always wondered why he did not breed those birds. I believe this man also.
This is a good topic since we are all about to pair up over the next few months and some are already breeding. Good luck to you. I like to pair them up one year and mix them and change the mates and compare who are throwing the good birds but it takes me several years because I do not change the pair in a year once they are together. I do have one pair I will definately put back together just because the offpring were top notch in my birds. BIll C
Last Edited by on Dec 31, 2009 7:30 PM
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wishiwon2
265 posts
Dec 31, 2009
9:07 PM
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Wow, its basic biology, jr high school level. 1 egg, 1 sperm, the 2 join and combine chromosomes. Half from one and half from the other. There is no other way outside a lab. Grandparents contribute nothing directly, only through their offspring, the parents.
It is true that the expression of genetic codes differs, based on order of dominance and modifiers. They could, therefore, resemble one parent more than the other, but the input from each parent is 50:50. Unless it was done in a lab there is no possible way a parent could contribute more or less than 50%.
Although its open for debate, I dont believe rolling behavior is controlled by just 1 gene. I believe it result of combination of 2 or more genes and is strongly affected by modifiers that turn on or off portions of the genes that control rolling behavior. The order of dominance has not been determined for these(rolling)gene sequences, it is therefore less predictable what the outcome will be. One parent may contribute more dominance than the other which would explain the variation of expression of these genes. But dominant or recessive it is still there and each parent puts in 50% of it.
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Jon
If it were easy, everybody would do it
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winwardrollers
390 posts
Jan 01, 2010
12:06 AM
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I would stick with the standard..."There are two copies of each gene – one copy inherited from each parent. The sperm and the egg each contain one copy of every gene needed to make up a roller. When the sperm fertilises the egg, the two sets of genes combine to form pairs of genes that make up the roller’s DNA and allow new life to begin.
I think that they can appear to look like 25% to 75% and 20% to 80% with the naked eye but the truth is 50:50.
bwinward
Last Edited by on Jan 01, 2010 7:18 AM
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pigeon pete
468 posts
Jan 01, 2010
3:15 AM
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What? how can youngsters inherit genes from the grandparents that the parents are not carrying?
You must have some strange customs and practices in your part of the world Bill.
The genes are inherited from both parents, but may not neccesarily be expressed equally.
If your father has brown eyes and your mother blue, you don't automaticaly end up with one blue and one brown eye. If you end up with two brown, it doesn't mean you didn't get the gene for blue, it just means that the brown is what gets to be expressed.
Happy new year,
Pete.
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fontanabound
146 posts
Jan 01, 2010
1:53 PM
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wow, so much info. so i guess its 50/50 after all huh.
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fontanabound
147 posts
Jan 01, 2010
6:54 PM
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ok, now im confused!
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BA Rollers
303 posts
Jan 01, 2010
8:07 PM
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You would have to get a little knowledge about basic genetics. Then it would make sense. For the most part the common rule is 50/50, but it doesn't always work out that way.
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Sunflower
GOLD MEMBER
595 posts
Jan 02, 2010
7:45 AM
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Fontanabound,
What Brian is trying to explain is that there are exceptions to the 50/50 rule. For example, color. If you put a Blue Bar cock on a Red Bar hen you would get Red Bar cocks that carry Blue since cocks get a color gene from both parents. But you would get only Blue Bar hens since hens only receive a single color gene from the father. Eye color is another exception. Hope this is helpful for you.
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Keep em Spinning
Joe
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Sound Rollers
168 posts
Jan 03, 2010
10:21 AM
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Hey guys, It's 50/50, no ifs, buts or how comes about it, in those 50/50 they're traits as explained by my 17 year old daughter and here's the proof.
John
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