Head colour genetics

[Tiaris]

The YTB Gouldian is the only Gouldian that will display his/her genetic make up by his/her outside appearance
all others are more secretive and need to produce youngsters to determine the genetic make up of the parent birds.

+ YH hens

[KENTUCKY]

Correct Tiaris

[SamDavis]

The YTB Gouldian is the only Gouldian that will display his/her genetic make up by his/her outside appearance
all others are more secretive and need to produce youngsters to determine the genetic make up of the parent birds.

+ YH hens

True in terms of head colour inheritance.
Of course these birds can still be carriers (splits) of other autosomal recessive mutations - blue, aus yellow, aus dilute, white breast, lilac breast, etc...

[vettepilot_6]

Hi Iaos...do you have any YH Gouldians in with them?

[iaos]

No, before these three YTB turned up, I only had BH RTB.

I had 3 turn up from 17 bred, so just under the expected probability.

Cheers Ian

[vettepilot_6]

No, before these three YTB turned up, I only had BH RTB.

I had 3 turn up from 17 bred, so just under the expected probability.

Cheers Ian

HMMM methinks these genetic forecasters are wrong...because I still believe I got RTBH from my YH...I will seperate this year and see what happens...

[KENTUCKY]

If blackheads were bred from YHs, BHs are a sex linked recessive, these BHs can only be BH hens,( type b) which will show a red tip but also carries one factor for yellow headedness.

[vettepilot_6]

If blackheads were bred from YHs, BHs are a sex linked recessive, these BHs can only be BH hens,( type b) which will show a red tip but also carries one factor for yellow headedness.

Are your YT BH's hens Iaos?

[iaos]

Add on to my previous Post
Mode of Inheritance is Autosomal Recessive

As per Kentucky's post I had two cocks and a hen.

[KENTUCKY]

Genetically impossible, there must have been funny business going on, (not unheard of) particularly if you colony breed
from a pair of YHs, where the Cock bird is split to BH, this mating can only produce BH hens type (c)
no BH Cock birds ever, in a colony system,one can not guaranty with absolute certainty the parentage of a particular brood of youngsters,
to be absolutely certain that these particular youngsters were bred by this particular set of parents, one must cabinet breed, one pair per cabinet,only then can one state without doubt that these youngsters are the off spring of this particular breeding pair, they must be, because in cabinet breeding there is no outside medeling.