A cell spends most of its time in what is called interphase, and during this time it grows, replicates its chromosomes, and prepares for cell division. The cell then leaves interphase, undergoes mitosis, and completes its division
Inherited genetic factors : hope it helps
Answer: If the F2 occurs in the ratio 9 blue:3 pink:4 white, one gene pair (i.e 2 genes) control the flower color phenotype.
Explanation: This principle is called INCOMPLETE DOMINANCE where one gene (dominant) won't completely override the other (recessive).
Let assume B represents the dominant gene and b represents the reccesive gene. Let also assume that Blue color is dominant over white color. We can assign the genotype as follows;
Homozygous dominant genes BB will produce Blue color
Homozygous recessive genes bb will produce white color
Heterozygous genes Bb will produce pink color.
Therefore, a pair of gene ( 2 genes) will determine the flower color phenotype.
<span>The Calvin cycle cannot operate during the night, as light is needed to convert carbohydrate molecules into chemical energy. However, some plants that have evolved (due to arid conditions) to utilize CAM photosynthesis (Crassulacean acid metabolism)--which the plant shuts it's stomata during the day, in order to reduce evapotranspiration, but open at night, to collect carbon dioxide. Thereby, making the majority of plants unable to compensate like these select few plants--that have evolved to do so.</span>