It is like a tiny organ because every organelle has a certain role in the cell for which it was designed. In this sense it resembles an organ as every organ has a certain role and function it has to perform as well. Organelles have a certain structure which is reflected in their function; this is another thing that is very similar to organs for example.
Answer: C, chromosome replication
Explanation:
A, B, and D only occur in meiosis, as crossing over is required for genetic variation, which isn't needed in mitosis, reduction division is when diploids are reduced to haploids, which only happens in meiosis, and homologous chromosomes making tetras doesn't occur in mitosis either. However, during interphase of both mitosis and meiosis, chromosomes (DNA more specifically) are replicated.
That chart lists what they have in common and different
BRCA1 gene is a tumor suppressor gene that can repair damaged DNA. Loss of BRCA1 gene will decrease the DNA repair, thus increasing the DNA damage. When exposed to free radical, the DNA can be damaged and the damage will accumulate. When the damage hit some area that regulating the cell replication, the cell can become cancer.