Introduction to Types of Chromosomes
The chromosomes are categorized into several types based on shape and position of the centromere. As per to the position of centromere, the eukaryotic chromosomes might be
1. rod shaped (telocentric and acrocentric),
2. L-shaped (sub-metacentric) and
3. V-shaped (metacentric).
There are two category of chromosomes relies on their function. They are as follow:
1. autosomes and
2. sex chromosomes.
Diagram: Four morphogenic types of chromosomes
Autosomes
They are exists in all the organisms' cells. They manage the somatic features of an organism. In the human being diploid cell, 44 chromosomes are autosomes while the rest two are sex chromosomes.
Sex chromosomes
In the diploid cells of animals and specific plants, one or more than one special chromosomes are dissimilar from the autosomes in their morphological structures and behaviour. These chromosomes are included in the sex determination. They are termed as sex chromosomes. In human, female XX chromosomes and male has XY.
Unusual chromosomes
Unusual chromosomes are abnormal chromosomes. They are different from the fundamental structure of normal chromosomes. Example: B-chromosomes and Double minutes. B-chromosomes are as well termed as supernumerary and accessory chromosomes. They are extra chromosomes found in a number of individuals in a population. Example: Maize. They are general in plants and they decrease viability.
Double minutes are unstable chromosome type structures. They comprise no centromere and formal telomeres. They take place in cancer cells that depict resistance against drugs.
Special types of chromosomes
In Eukaryotic organism's specific chromosomes are found only in specific special tissues and are not observed in other tissues. These special types of chromosomes are larger in size and are termed as giant chromosomes. In particular plants, they are found in the suspensors of the embryo. There are two kinds of giant chromosomes -
1. Polytene chromosome
Polytene chromosomes were examined by C.G. Balbiani in the year 1881 in the salivary glands of Drosophila. The characteristic aspect of polytene chromosome is that along the length of the chromosome here is a variety of dark bands alternate with clear zones termed as inter bands. The polytene chromosome comprises very large puff known as Balbiani ring. It is as well termed as chromosomal puff. Like this chromosome occurs in the salivary gland it is termed as salivary gland chromosomes.
Diagram: Polytene chromosome
2. Lamp brush chromosome.
Lamp brush chromosomes were very firstly examined by Flemming in the year 1882. It is looked like a shape of brushes. They take place at the diplotene stage of meiotic prophase in oocytes of an animal Salamandor and in unicellular alga Acetabularia's giant nucleus. The extremely condensed chromosome creates the chromosomal axis, from that lateral loops of DNA extend the result of intense RNA synthesis.
Diagram: Lamp brush chromosome
Latest technology based Biology Online Tutoring Assistance
Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Types of Chromosomes homework help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Types of Chromosomes, project ideas and tutorials. We provide email based Types of Chromosomes homework help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Types of Chromosomes. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Biology homework help and assignment help services. They use their experience, as they have solved thousands of the Biology assignments, which may help you to solve your complex issues of Types of Chromosomes. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
tutorsglobe.com trypanosomes assignment help-homework help by online medical parasitology tutors
tutorsglobe.com theories of coordination compounds assignment help-homework help by online coordination compounds tutors
tutorsglobe.com waste management assignment help-homework help by online environmental science tutors
tutorsglobe.com feminist research methodologies assignment help-homework help by online humanities tutors
Common-sized financial statements are general financial statements (like the income statement, statement of financial position and statement of cash flows) that are expressed in terms of a number of base figures.
tutorsglobe.com purple of cassius assignment help-homework help by online compound tutors
tutorsglobe.com epistemology assignment help-homework help by online humanities tutors
www.tutorsglobe.com offers system level project planning homework help, system level project planning assignment help, case study, writing homework help, online tutoring assistance by computer science tutors.
tutorsglobe.com dna library assignment help-homework help by online biological database tutors
tutorsglobe.com hydrology assignment help-homework help by online humanities tutors
Pharmaceuticals tutorial all along with the key concepts of Antibiotics, Production of Penicillin, Production of Acetylsalicylic acid or aspirin and Production of Tetracycline
The armature to be checked is placed on the growler and after that the growler is switched ‘ON’. Put one lead of an AC mill voltmeter on the commutator bar the other meter lead on the shaft.
We shall concentrate on the IASB rules and, particularly, those consisted of in IAS 1 Presentation of Financial Statements.
www.tutorsglobe.com offers alcohol nomenclature homework help, alcohol nomenclature assignment help, online tutoring assistance, organic chemistry solutions by online qualified tutor's help.
tutorsglobe.com laws of mendel assignment help-homework help by online mendels laws of inheritance tutors
1934658
Questions Asked
3689
Tutors
1496220
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!