Head - structure of the sperm, Biology

Assignment Help:

Head - Structure of the Sperm

It exhibits a diversity of shapes in different animal groups, e.g., spherical (teleost fishes), rod or lance shaped (amphibians), spirally twisted like a corkscrew (birds), spoon shaped (man), flattened (buffalo) or hooked (mouse and rat) or occasionally round (bivalve molluscs). Some of these shapes may be interpreted as an adaptation to propulsion in fluid media. The genetic functions are embodied in the nucleus; activation of egg during fertilization is basically initiated by anterior cap like acrosome. The nucleus occupies the greater part of head and it also determines the shape of head. During the course of sperm differentiation (spermiogenesis), everything in the nucleus not directly concerned with the transmission of heredity characters is discarded leaving only the actual material of genes (DNA) which is tightly packed within the nucleus.


Related Discussions:- Head - structure of the sperm

Zoology, what are the physical requirements to become a zoologist?

what are the physical requirements to become a zoologist?

Diversity, Importance of diversity

Importance of diversity

What are x-linked traits, What are X-linked traits? The X-linked traits...

What are X-linked traits? The X-linked traits are the phenotypical traits conditioned by genes located in the nonhomologous (heterologous) portions of the X chromosome.

Diagnosis of diabetes mellitus, Q. Diagnosis of diabetes mellitus? Time...

Q. Diagnosis of diabetes mellitus? Timely and proper diagnosis plays a key role not only in identifying new cases but also in managing old cases with or without diabetic compli

Bovine parainfluenza, B ovine parainfluenza This virus belongs to the ...

B ovine parainfluenza This virus belongs to the genus Respirovirus in the subfamily Paramyxovirinae of family Paramyxoviridae. It causes respiratory syndrome in cattle and she

Explain about the insulin syringe, Insulin Syringe To administer Insuli...

Insulin Syringe To administer Insulin properly, familiarize yourself with information about insulin: (a) insulin syringes, (b) storage, (c) site selection (d) steps for injecti

Regulation of ovarian activity, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

How different is the amphibian heart from the fish heart, Q How different i...

Q How different is the amphibian heart from the fish heart? The fish heart has only two chambers, a ventricle and an atrium, and the blood that comes to it is purely venous.

Homeopathic cures, If water dousing, homeopathic cures, and so on work for ...

If water dousing, homeopathic cures, and so on work for just me but not for anyone else, it is still science.

Regeneration in hydra, Regeneration in Hydra You previously know that...

Regeneration in Hydra You previously know that the Hydra has spectacular regenerative ability. The hydra is a small tubular, two layered fresh water animal computing 20mm in

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