Genetics

[Tony Bucci]

According to the information I got from the web site http://www.parrotlets.us/mutations3.html, if Blue split to Yellow paired to a Yellow split to Blue I will get 25% of Whites.

Question: If I mate Blue to a Yellow I will get Blues split to Yellow or Yellows split to a Blue.
Question2: Is a Blue dominant over Yellow or Yellow is dominant over Blue?

Tony

[RockyandhisFriends]

1) If you mate a blue bird with a yellow bird you will get 100% green birds double split to blue and yellow.
2) Both blue and yellow are recessive.

Phil

[father0fseven]

Blue and Yellow are equally dominant or equally recessive -- depending on how you want to look at it.

If a bird has all the genes for both yellow and blue, the bird ends up white...

Think of it this way... A gene from mom for yellow + a gene from dad for yellow = a yellow bird. A gene from only one parent for yellow = a green bird split to yellow. No genes for yellow = green bird...

Think of it this way... A gene from mom for blue + a gene from dad for blue = a blue bird. A gene from only one parent for blue = a green bird split to blue. No genes for blue = a green bird.

Now....

If mom and dad give a gene for blue and mom and dad give a gene for yellow, the bird will be white. If the bird gets two genes for blue but only one for yellow, the bird will be blue split to yellow. If the bird gets two genes for yellow but only one for blue, the bird will be yellow split to blue. If the bird gets only one blue and one yellow gene, the bird will be green double split to blue and yellow.

[RockyandhisFriends]

The only dominant mutation parrotlet at this time is the dominant pied.
Dominant mutations only require one parent to produce the mutation as explained with yellow cheek cockatiels below.

Dominant Mutations

Dominant mutations are unique in that it requires only one of the parents to produce the mutation in their offspring. For example if you have a Dominant Yellow Cheek hen you will get a percentage of either male and/or female Dominant Yellow Cheek babies. For Sex-linked Yellow Cheek you must have Sex-Linked Yellow Cheek in both the male and female to get male Sex-Linked Yellow Cheek babies. A bird cannot be split to a dominant mutation. You either see it or you don't. A single factor dominant bird has one X chromosome containing the mutation. A double factor dominant has two X chromosomes, hence only males can be double factor.

Phil