Here is a compilation of essays on ‘Reproductive Cycles in Vertebrates’ for class 9, 10, 11 and 12. Find paragraphs, long and short essays on ‘Reproductive Cycles in Vertebrates’ especially written for school and college students. Reproductive Cycles in Vertebrates Essay Contents: Essay on the Reproductive Cycles in Marine Fishes Essay on the Reproductive Cycles in Freshwater Fishes Essay on [...]
Some of the important theories concerning the activation of egg by sperm are as follows: 1. Bataillon's Theory 2. Sensitization to Calcium Theory 3. Loeb's Theory 4. Lillie's Theory 5. Repressor Theory of Activation. 1. Bataillon's Theory: Bataillon (1910, 11, 12 and 16) suggested that the exudation or the excretion of substances into the perivitelline space and elevation of the [...]
In recent years sex determination has been differentiated from sex differentiation, and sex determination mechanism is explained more on the basis of the specific genes located on sex chromosomes and autosomes. Sex determination is recognized as a process in which signals are initiated for male or female developmental patterns. During sex differentiation, events occur in definite pathways leading to the [...]