Thomas is studying the process of photosynthesis in algae. in which organelle does the photosynthesis take place?

chloroplast

Explanation:

in the chloroplast there are the granum and the stroma where the dark stage is carried out in the stroma and the light stage is in the grana

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.