**Core Concept**
Meiosis is a specialized type of cell division that reduces the chromosome number by half, resulting in the production of gametes (sperm or eggs) with unique combinations of genetic traits. This process is crucial for sexual reproduction, as it allows for genetic diversity and increases the chances of viable offspring.

**Why the Correct Answer is Right**
Meiosis occurs in germline cells, which are the cells responsible for producing gametes. During meiosis, the diploid (2n) number of chromosomes is reduced to a haploid (n) number, resulting in the production of four genetically unique cells. This process involves two successive cell divisions (meiosis I and meiosis II) without DNA replication in between. The correct answer is **B. Oogenesis**, as meiosis occurs in the oogonia of the ovaries, which eventually develop into mature eggs. In oogenesis, meiosis is initiated but arrested at the diplotene stage, allowing the oocyte to grow and mature.

**Why Each Wrong Option is Incorrect**
**Option A:** Mitosis is a type of cell division that results in the production of daughter cells with the same number of chromosomes as the parent cell, which is not the case in meiosis.

**Option C:** Spermatogenesis is the process of sperm production in males, which also involves meiosis, but it is not the correct answer as the question specifically asks about the transmission of meiosis.

**Clinical Pearl / High-Yield Fact**
Meiosis is a crucial process for genetic diversity, and errors in meiosis can lead to genetic disorders, such as aneuploidy (e.g., Down syndrome). Understanding the mechanisms of meiosis is essential for reproductive medicine and genetic counseling.

**Correct Answer:** B. Oogenesis.