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

Create a standard curve, Explain how you would create a standard curve to d...

Explain how you would create a standard curve to determine the amount of orange dye that had been added to a can of orange soda

Examples of human cells that produce proteins, Q. What are few examples of ...

Q. What are few examples of human cells that produce proteins for exportation? Which cytoplasmic organelle is expected to be abundant and well-developed in those cells? Special

Disorders of female reproductive system, DISORDER S OF FEMALE REPRODUCTIVE...

DISORDER S OF FEMALE REPRODUCTIVE SYSTEM - (i)         Sterility (ii )     Menstrual irregularity - This may be amenorrhea (absence of M.C.) or excessive bleeding (

Dictyosomes, Dictyosomes  are produced on the Organelles in the plant cells...

Dictyosomes  are produced on the Organelles in the plant cells composed of the series of flattened membrane sacs which sort, chemically modify, and package protein srough endoplasm

Circulatory systems in animals, Circulatory Systems in Animals In anim...

Circulatory Systems in Animals In animals that have efficient circulatory systems and readily permeable vascular skins, gas exchange occurs through the integument. Thus we fin

Smoking, SMOKIN G - It means to draw tobacco smoke into the mouth o...

SMOKIN G - It means to draw tobacco smoke into the mouth or lungs & exhale it via mouth, nostrils or both. Tobacco is obtained from Nicotiana tobacum & Nicotiana r

Explain the sporangiophores features of rhizopus, Explain the Sporangiophor...

Explain the Sporangiophores features of Rhizopus? 1. Sporangiophores swell at the tip into a spherical knob like structure called sporangium. It has two zones. - Central dom

Explain the acquired deficiency of the vitamin k metabolism, Why are some t...

Why are some types of hemorrhagic diseases caused by genetic or acquired deficiency of the vitamin K metabolism? Lack of vitamin K predisposes to hemorrhages as this vitamin i

Cost due to damage to equipment, Cost due to Damage to Equipment Cost ...

Cost due to Damage to Equipment Cost due to Damage to Equipment, Property etc. Tooling may have to be redesigned, adding cost. Cost due to reduced output and delay

Functions of the musculoskeletal system, Q. What are the functions of the m...

Q. What are the functions of the musculoskeletal system? The musculoskeletal system has the functions of protecting and supporting organs, maintenance of the body spatial confo

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