Respuesta :
When two blue Andalusian offspring (b, w) are mated, the probable phenotypic ratio seen in their offspring would be 25% black, 50% blue, 25% white.
To understand this outcome, it is helpful to consider the genotypes of the parents. The genotype of a blue Andalusian (b, w) is heterozygous for the gene that determines feather color, meaning that it has one dominant allele (b) for black feathers and one recessive allele (w) for white feathers. The dominant allele is expressed in the phenotype (the physical appearance of the bird), so the blue Andalusian appears to have blue feathers (a mixture of black and white).
When two blue Andalusian offspring (b, w) are mated, there are three possible genotypes that can result from the combination of their alleles: bb (homozygous dominant for black feathers), bw (heterozygous for black and white feathers), and ww (homozygous recessive for white feathers). Each of these genotypes has a specific probability of occurring in the offspring, as follows:
- bb: 25% probability (1/4 chance of occurring)
- bw: 50% probability (1/2 chance of occurring)
- ww: 25% probability (1/4 chance of occurring)
In terms of phenotypes, the bb genotype will result in black feathers (100% black), the bw genotype will result in blue feathers (50% black and 50% white), and the ww genotype will result in white feathers (100% white).
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