Aresearcher has a plant that displays yellow flowers, the trait dominant over white flowers in the species. how might the researcher discover if his plant is heterozygous or homozygous yellow? note: 1. state the name of the experiment and explain how it works. 2. be sure to use fractions or percentages to explain the possible outcomes. 3. use punnett squares if needed. 4. make sure your essay has an introductory sentence and a supporting paragraph.

In order to know whether the phenotype is homozygous or heterozygous, a test cross is performed. As only one character of flower color is being studied, the test cross will be a monohybrid one. For this, the plant will be crossed with the plant which has the recessive trait, i.e., white flower in this case. If the offspring has white colored flowers, then the parent was heterozygous. If the offspring bears yello flowers, the  the parent was homozygous for the dominant allele.  In this case, a ratio of 1:1 wil be obtained in the offsprings, which means half of the population will bear white flowers and half will have yellow flowers, because recessive allele will come from both the tested corssed parents nd will obviously produce white flower plants also. On the other hand, if the parent would have been homozygous for yellow flower, all of the offsprings in the test cross yould have been yellow flower bearing plants. 

Answer : romans built laws to manage the pollution which was lead by smoke produced by the factories.

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.