They can produce 3 types of gametes; gggg, ggtt and tttt in the ratio of 1:2:1. As shown in the table attached, the tetraploid parents produce diploid gametes that combine to form genetically varied offspring.
The genotypes may differ from that of the genotype depending on the interaction of the dominant, recessive and codominant alleles.
C. Green plants would be correct
The plant wilts. It is because it doesn't have enough water to stay the cells turgid, and therfore it cannot support the plant.
It won't die immediately, but if you don't keep watering it, it'll die.