The number of individuals remains the same. These terms are defined in text. Numerous answers are possible. The major similarity is that both produce gametes. For specific physical similarities, see pages 196 and 197.
Gametes are haploid to preserve the diploid number.
The human oocyte rids itself of excess genetic material by forming polar bodies. The excess cytoplasm in the human sperm falls away during maturation. Male gametogenesis takes 74 days. Female gametogenesis technically varies with the oogonium. Considering independent assortment only, the possible number of pups would be 239 or 5.4976 x 1011 but statistically this is an overestimation.