AP BIOLOGY

Detailed explanation-1: -III. Spermatogenesis produces four haploid sperm cells from each diploid precursor cell, while oogenesis produces one egg cell and two or more polar bodies.

Detailed explanation-2: -Why does spermatogenesis result in four spermatids, but oogenesis only results in one ovum? a. In oogenesis, the division of chromosomes is unequal, whereas spermatogenesis has equal division of the chromosomes.

Detailed explanation-3: -Meiosis is a step during spermatogenesis and oogenesis. Spermatogenesis produces four haploid sperm cells, while oogenesis produces one mature ovum.

Detailed explanation-4: -The unequal cytoplasmic division ensures that the egg has ample nutrients. Thus, due to unequal division, only one egg develops during oogenesis compared to four sperms after meiotic division in oocytes and spermatocytes, respectively.

Detailed explanation-5: -At puberty, there is an increase in testosterone levels; this initiates meiosis I. During this stage, a primary spermatocyte generates two secondary spermatocytes, which then undergo meiosis II. Two haploid spermatids (haploid cells) are generated by each secondary spermatocyte, resulting in a total of four spermatids.