Normally, only female cats have the tortoiseshell phenotype because ) a male inherits only one allele of the x-linked gene controlling hair colorb) the y chromosome has a gene blocking orange colorationc) only males can have barr bodiesd) multiple crossovers on the y chromosome prevent orange pigment production

answer; a male inherits only one allele of the x-linked gene controlling hair color;

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.

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.