Most animals are well adapted to their biotic and abiotic conditions due to behavioural, physiological or structural adaptations that increase their chances of survival and reproduction. I looked it up for you
Thr main arguments were, at the time of allowing this type of prctices, that it will increase the food supply and the types of genetic modified entities were imune to certain natural and/ or industrial pollution factors. However, given the mutations that resulted and the ethcs in the ( economi) strategy, this type of aproach was legally forbiden within the EU, for example
Parents: Homozygous brown-eyed (M) -
B B blued-eye (F) -
b b [since blue (b) is recessive then and brown (B) is dominant then
in order for the blue gene to
show the you need double recessive or the brown
gene absent
Offspring:
So based on the Punnett cross then you realize that all the possible of spring carry the
genotype B b and as such the
phenotype brown eyes