D. Mitochondria and Chloroplast
i'm sorry if it's wrong but that should be the right answer
to determine whether traits can be inherited independently
Explanation:
the use of dihybrid crosses allowed him to discover the law of independent assortment / discovering that each locus had 2 alleles which segregate during the creation of gametes.
Answer:
GENE
Explanation:
The functional segment of the DNA that contain instructions for a specific trait is known as a gene.