No doubt the wild birds were grey
Could you follow their logics to describe an inheritance pattern to blue, cobalt, mauves and albinos birds?
So there are Dark, Ino and other genes as well but they survive barely and will eventually die out because the non-Grey phenotypes aren’t as well camouflaged.
he had just shown without any doubt that Blue was recessive respective to Grey, and viceversa Grey was dominant respective to Blue; that is Blue and Grey were different alleles of the same locus:
His breeding scenario is wrong as it is written as if Grey and Blue are alleles, but what he described does not point to alleles. I don’t see how this proves any allelic relationship. If they were alleles neither would be dominant or recessive to the other, all alleles of the same locus are equal genetically. Alleles are co-dominant with each other.
1. BlueBlue x GreyGrey ..... 100% heterozygous GreyBlue .... Grey phenotype
2. GreyBlue x GreyBlue ..... 25% GreyGrey, 50% GreyBlue & 25% BlueBlue .... 75% Grey phenotype and 25% Blue phenotype.
3. GreyGrey x GreyBlue .... 50% GreyGrey & 50% GreyBlue .... 100% phenotypic Grey
The above is the same as below with the substitution of ‘Grey’ with ‘Wildtype’ but as Wildtype is Grey it is exactly the same except that at 2. below you have put BlueBlue at the front and WildWild at the back, irrelevant.
1. BlueBlue x WildWild .... 100% heterozygous BlueWild .... Wild phenotype (Grey)
2. BlueWild x BlueWild .... 25% BlueBlue, 50% BlueWild & 25% WildWild .... 25 % Blue phenotype and 75% Wild phenotype (Grey)
3. WildWild x WildBlue .... 50% WildWild & 50% WildBlue .... 100% phenotypic Wild (Grey).
if Blue and Grey are not alleles of the same gene, then your 25% BlueBlue (point 2) would be expressed at the same time as the GreyGrey ... and I do not see any Grey there. How can you explain this?
You have said there is 75% Grey phenotype at 2. in both scenarios, so you have contradicted yourself by saying you see no grey phenotype at 2. in the second scenario. The phenotype outcomes are exactly the same if the mistake is ignored. That is both are worded wrong as Blue and Grey are not alleles simply because grey phenotypes had better camouflage and thus dominated the wild IRN population on the island. Therefore this exercise is moot.
That's very simple!!! Blue is masking Grey!!!
This is contradictory to your statement that “Blue and Grey are alleles of the same locus”, as if they are alleles they have to be co-dominant.
Genetically the ‘wild’ birds are 95% a mixture of GreyGrey BlueBlue combination mutants and 5% BlueBlue mutants in various combinations with other mutations. Wildtype are still Green birds, they have died out on this island due to environmental pressures.
He was wrong to treat Blue and Grey as alleles in the first set when they were not co-dominant. Selection pressures are not the same as genetics. Selection uses genetics.
She was wrong to use ‘Wild’ for Grey in the second set as ‘wild’ in this whole scenario is not a mutation but refers to any IRN on the island.
The only correct possible pairings on the island are:
1. BlueBlue x GreyGrey BlueBlue
2. GreyGrey BlueBlue x GreyGrey BlueBlue
3. BlueBlue x BlueBlue