John who is color blind married a women Rita who has normal vision. Both Rita’s parents are homozygous dominant for color vision. What are the chances of John and Rita’s children being color blind?

Photosynthesis uses co2 and cellular respiration produces co2. we call the point when the two processes are in balance--when there is no net production of co2--the compensation point. how might you limit one of the processes in order to achieve a compensation point?