In fruit flies, the following genes are located on separate chromosomes: L
• eyes - E eyeless = e
hairy body = H hairless body = h
large wings = L small wings = 1
.
Predict the phenotypic ratio that would result from a cross between two flies heterozygous for each trait.

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.