Question

(a) How is ‘oogenesis’ markedly different from ‘spermatogenesis’ with respect to the growth till puberty in the humans?
(b) Draw a sectional view of human ovary and label the different follicualr stages, ovum and Corpus luteum.

Answer 1

Spermatogenesis in humans

Explanation:

a) The difference between spermatogenesis and oogenesis with respect to the growth till puberty is given below:

• Spermatogenesis:  
• It takes place in males throughout life starting from puberty.  
• A single spermatogonium produces 4 haploid sperms after the second meiotic division.  
• Spermatogenesis is completed in testes and produces 4 haploid sperms.  
• oogenesis :
• It starts before birth during embryonic development and takes place up to menopause.  
• A single oogonium produces one functional ovum after the second meiotic division and two non-functional polar bodies.  
• The second meiotic division is completed in oviduct after the entry of sperms in secondary oocyte.  

b)  Sectional view of human ovary with labels are attached .