NEET PG DENTAL EXAM

Detailed explanation-1: -Mammalian primordial germ cells form and migrate to the gonad during embryonic development. After arriving at the gonad, the germ cells are called oogonia and develop in clusters of cells called germ line cysts or oocyte nests. Subsequently, the oogonia enter meiosis and become oocytes.

Detailed explanation-2: -In oogenesis, diploid oogonium go through mitosis until one develops into a primary oocyte, which will begin the first meiotic division, but then arrest; it will finish this division as it develops in the follicle, giving rise to a haploid secondary oocyte and a smaller polar body.

Detailed explanation-3: -Oogenesis begins when an oogonium (with the diploid number of chromosomes) undergoes mitosis to form primary oocytes (also with the diploid number of chromosomes). Oogenesis proceeds as a primary oocyte undergoes the first cell division of meiosis to form secondary oocytes with the haploid number of chromosomes.