Vitellogenesis, Biology

Assignment Help:

Vitellogenesis

Vitellogenesis is the stage where much of the oocyte growth occurs. The completion of second maturation division (meiosis), which may occur after ovulation, results in ripe egg or ovum. In some species such as sea urchins and frogs, the female produces hundreds or thousands of eggs at a time where as in most mammals including humans only a few eggs are produced in the entire lifetime of the individual. In this section we shall discuss oogenesis in two groups of animals,

 (1) The amphibians as an example of organisms which produce yolky eggs and

 (2) Mammals, as an example of organisms whose eggs do not contain any yolk.


Related Discussions:- Vitellogenesis

What are primary indications for pharmacologic stress, Q. What are primary ...

Q. What are primary indications for pharmacologic stress? The primary indications for pharmacologic stress are inability to exercise or the desire to identify viable myocardium

Explain acyclovir, Explain Acyclovir Available in topical, oral, and in...

Explain Acyclovir Available in topical, oral, and intravenous (IV) formulations, acyclovir is used to treat herpes simplex virus (HSV) and varicella-zoster virus (VZV) infectio

How many different types of pseudopods can amoebas have?, Tests of shelled ...

Tests of shelled amoebas are made from a variety of substances including sand grains, chitin and substrate, calcium salts, and even silica. These shells still accumulate in ocean d

What are the main characteristics of the bryophytes, What are the main char...

What are the main characteristics of the bryophytes? Bryophytes are nonvascular plants, i.e., they do not have conductive tissues and they perform transport of water and nutrie

Male reproductive disorders-aplasia of epidydimis, Aplasia of epidydimis ...

Aplasia of epidydimis This condition is seen in only 1 or 2 % of young bulls and is marked by absence of one (more common) or both epididymis. Bulls having a single epidydimis

Explain modified starches, Modified Starches In your opinion, what woul...

Modified Starches In your opinion, what would be an ideal starch for all industrial uses including in food use? Well, one would think an ideal starch  for most of the foods sho

Explain cephalization in nematodes and platyhelminthes, How is the nervous ...

How is the nervous system characterized in beings of the phylum Annelida? How can one compare cephalization in annelids to cephalization in nematodes and platyhelminthes? Annel

What is the photoperiod, What is the photoperiod? The Photoperiod is th...

What is the photoperiod? The Photoperiod is the daily time period of light exposure of a living being and the photoperiod may differ according to the period of the year.

Explain intensity of heart sound, Explain Intensity of heart sound? Int...

Explain Intensity of heart sound? Intensity of S 1, particularly M 1 depends on the position of the bellies of mitral leafets when the LV begins to contract since S 1 is loudes

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd