Answer:
In the above question the ratio of phenotype is asked but the options given aren't according to phenotype hence the options need correction.
But, if you consider the ratio of genotype then option ( A= AaBb x aabb a. The A and B genes are on separate chromosomes ) would be the correct answer.
Explanation:
An example of this would be eye color. You can put contacts in changing the color but not necessarily changing the genes.
When the heated part of the mantle rises through the cooler part , this is an example of Convection.