Explain karyotype - animal taxonomy, Biology

Assignment Help:

Explain Karyotype - Animal Taxonomy?

In animals systematic, it is the karyotype, that is the chromosome number and structure which are used quite extensively either separately or both together.

chromosome number as you know is quite constant within a species, though it may vary from one species to another even within the same genera. Among animals the chromosome number ranges from a diploid of 2 in Parascaris  equorum vat univalins to 446 in the lycaenid butterfly (Lysandra  arlantica). However, in most animals it is between 12-60 chromosomes.

1914_Karyotype.png

figure: The phylogeny of Trichopternn families plotted on of chrmmme numbers (FhKiauia. 1%7).

Generally, the chromosome number is not enough for identifying organisms, though in some it has proved to be quite useful, as for example in the marsupial family Didelphidae (opossums) where species of genus (Monodelphis have a diploid number of 18 chromosomes and those of genus Didelphis have a diploid number of 22 chromosomes.

Similarly in the order of Trichoptera, the chromosome number alone has been used to plot the phylogenetic relationships among the various families as you can see in Figure.


Related Discussions:- Explain karyotype - animal taxonomy

Cell interactions and ooplasmic determinants, Cell Interactions and Ooplasm...

Cell Interactions and Ooplasmic Determinants Microscopic observations of egg cytoplasm suggests that it is not homogenous in appearance. The observable variations in the cytop

Pporifera, write the general account of porifera

write the general account of porifera

How plants control opening and closing of the stomata, How plants control t...

How plants control the opening and the closing of the stomata? The closing and the opening of the stomata depend upon the necessity of the plant to lose water and heat through

Etiological factor of peptic ulcer, Q. Etiological factor of peptic ulcer? ...

Q. Etiological factor of peptic ulcer? Peptic ulcer results when the neural and hormonal abnormality disrupts the factors that normally maintain mucosal integrity and permit pr

What is the importance of biotin, What is the Importance of biotin Biot...

What is the Importance of biotin Biotin is involved in a number of important metabolic reactions, probably as coenzymes. Deficiency symptoms are manifest as degenerative cha

Impulse transmission, The conduction of impulse in a nerve fibre is. a elec...

The conduction of impulse in a nerve fibre is. a electrochemical process. Maximum speed of transmission of nerve impulse can be 13 metre/second due to axoplasm is much resistant to

Gastropods - feeding and digestion in molluscs, Gastropods - Feeding and Di...

Gastropods - Feeding and Digestion in Molluscs In several gastropods the digestion is extracellular. Though, some herbivore gastropods like Crepidula are ciliary feeders and h

In vivo imaging in psychiatry, In vivo imaging in psychiatry To illustr...

In vivo imaging in psychiatry To illustrate the ingenious applications to which in vivo imaging can be put, consider the use of PET in the study of hallucinations by Frith and

What is the improper implant type in improper bone type, Improper Implant t...

Improper Implant type in Improper Bone Type In routine sites with good quality bone, the clinician should prefer implants without any superadded HA coatings and avoiding their

Glycolysis, steps involved in glycolysis

steps involved in glycolysis

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