Please help me with 4 through 6

This is due ! matching pairs of chromosomes from parents are called a. homologous chromosomes b. heterozygous chromosomes c. herterogenes d. homologous bands

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Hershey and chase confirmed that dna, not protein, was the genetic material. how do the results of their two experiments support this conclusion?