Peculiarities of mitosis - cleavage, Biology

Assignment Help:

Peculiarities of Mitosis - Cleavage

From the following you will learn that the mitosis in the phase of cleavage has some striking peculiarities:

a) Synchronization of cell divisions of blastomeres: The early blastomeres divide simultaneously (synchronously) producing two blastomeres from zygote followed by 4,8,16,32 and so on, in most cases. However, such synchronization is lost, during later cleavage divisions.

b) No interphase between two successive divisions, i.e. here is no growth in the amount of cytoplasm in the derived blastomeres with the result that the size of daughter blastomeres continues to decrease during successive cleavages.

c) The size of the nucleus remains practically unchanged. Therefore the nucleus: cytoplasm ratio, which is very small in the fertilized egg cell or zygote, continues to increase in the blastomeres derived from successive cleavage divisions.

d) Rate of cell divisions is very rapid and very large number of cells is produced during cleavage. This is possible due to absence of interphase. The rate slows down later on.


Related Discussions:- Peculiarities of mitosis - cleavage

Define work capacity that is relevant to sports nutrition, Define Work Capa...

Define Work Capacity that is relevant to sports nutrition? There are generally two areas of work capacity that is relevant to sports nutrition one is aerobic capacity and the o

Ketosis, K e to s i s It is also known as acetonemia in bovines or...

K e to s i s It is also known as acetonemia in bovines or pregnancy toxaemia in sheep and is associated with ketonemia, ketonuria and low blood glucose. E t iol

Explain what is light microscope - microscopy, Explain what is Light Micros...

Explain what is Light Microscope - Microscopy Modern light microscopes are compound microscopes. Here the magnified image formed by the objective lens is further enlarged by on

What is biosynthetic pathways, The intermediates in the cycle give precurso...

The intermediates in the cycle give precursors for various biosynthetic pathways. An instance is as given below: -  From citrate synthesis of fatty acids; -  Amino acid synth

Supenisory nursing round, Supenisory Nursing Round: Supervisory rounds...

Supenisory Nursing Round: Supervisory rounds are tours or excursions into areas where patients are cared for where personnel operate, where intra and inter departmental commun

Class of coclentrata, ????? # 100 ??????????? #Minimum ?????? ?????

????? # 100 ??????????? #Minimum ?????? ?????

Define physical capacity tests for aerobic capacity, Define Physical Capaci...

Define Physical Capacity Tests for Aerobic capacity? Aerobic capacity has already been defined. Aerobic capacity is usually measured using a tread mill test in which the intens

What is an ecosystem?, What is an ecosystem? An ecosystem is the system...

What is an ecosystem? An ecosystem is the system that composed of biotic and abiotic factors in interaction.

Why did scientists want to map the human genome, Why did scientists want to...

Why did scientists want to map the human genome? They wanted to learn the location of all the significant genes in the genome in order to learn how the genome is organized, ho

Diversity, WHAT IS PANDA BAO BAOLOGY.?

WHAT IS PANDA BAO BAOLOGY.?

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