Consider the following differences between heterochromatin and euchromatin and choose the correct answer: 1. Heterochromatin stains deeply while euchromatin stains less deeply 2. Heterochromatin is late replicating while euchromatin replicates during the early stage of the S phase 3. Heterochromatin does not become acetylated but euchromatin takes up acetic acid on its histone during interphase 4. The crossover frequency is more in heterochromatin than in euchromatin

Answer: Option A