2 edition of expression of supernumerary chromosomes in Myrmeleotettix maculatus (Thunberg). found in the catalog.
expression of supernumerary chromosomes in Myrmeleotettix maculatus (Thunberg).
Andrew William Harvey
Thesis (Ph.D.) - University of East Anglia, School of Biological Sciences, 1977.
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What is the advantage of cultural change in the pacific societies. Can a Republican vote in the Virginia Democratic Primary. The distribution of Myrmeleotettix maculatus B-chromosomes in part of East Anglia has been mapped twice, at an interval of 10 years.
A cline in B-chromosome frequency is moving forward at c. Andrew William Harvey has written: 'The expression of supernumerary chromosomes in Myrmeleotettix maculatus (Thunberg)' Asked in Oral Health and Dental Care, Wisdom Teeth and Oral Surgery, Dentists.
Hewitt, G.M. Meiotic drive for a B-chromosomes in the primary oocytes of Myrmeleotettix maculatus (Orthoptera: Acrididae). Chromosoma56, – [Google Scholar] Nur, U. Maintenance of a “parasitic” B chromosome in the grasshopper Melanoplus femur-rubrum. Genetics87, – [Google Scholar]Cited by: 9. B chromosomes have been reported in many eukaryotic organisms.
These chromosomes occur in addition to the standard complement of a species. Bs do not pair with any of the A chromosomes and they have generally been considered to be non-essential and genetically inert.
However, due to tremendous advancements in the technologies, the molecular composition of B chromosomes has Cited by: 2. B chromosomes are supernumerary chromosomes found in addition to the normal standard chromosomes (A chromosomes).
B chromosomes are well known to. B chromosomes are widely distributed among eukaryotes. Table summarizes the number of species in which B chromosomes have been found to date in different taxa. It shows that B chromosomes have been reported in 10 species of fungi, nearly plants (more than when different ploidy levels of the same species are considered separately), and well over animals.
[B] chromosomes ([Bs]) are expression of supernumerary chromosomes in Myrmeleotettix maculatus book components of the genome and do not confer any advantages on the organisms that harbor them.
The maintenance of [Bs] in natural populations is possible by their transmission at higher than Mendelian frequencies. Although drive is the key for understanding [B] chromosomes, the mechanism is largely by: Kimura, M., and H.
Kayano, The maintenance of supernumerary chromosomes in wild populations of Lilium callosum by preferential segregation. Genet – PubMed Google ScholarCited by: Hewitt GM () Meiotic drive for B-chromosomes in the primary oocytes of Myrmeleotettix maculatus (Orthopera: Acrididae).
Chromosoma – PubMed Google Scholar Houben A, Kynast RG, Heim U, Hermann H, Jones RN, Forster JW () Molecular cytogenetic characterisation of the terminal heterochromatic segment of the B-chromosome of rye Cited by: Search this site: Humanities. Architecture and Environmental Design; Art History.
Accessory Chromosomes Accessory Chromosomes Muntzing, A In most caSes the genome represents a delicately balanced unit of cooperating chromosomes, each segment of which must be present in order to secure normal viability. I t has long been known, however, that there is a difference between the genetically active and highly differentiated euchromatic segments of the chromoÂ.
On the basis of number of chromosomes, polyploidy can be divided into euploidy and aneuploidy. Chapter 10 deals with polyploidy and its role in crop improvement. In addition to normal karyotype, wild populations of animals, plants and fungi contain B chromosomes, also known as supernumerary or accessory chromosomes.
Full text of "General embryological information service" See other formats. The Origin of Supernumerary Chromosomes in Natural Populations of Clarkia elegans. HARLAN LEWIS Book Review The B-Chromosome System of Myrmeleotettix maculatus (Thunb).
The Dynamics. HEWITT AND B. JOHN PLANT CYTOGENETICS. Second Edition PLANT CYTOGENETICS Second Edition Ram J. Singh, Ph.D. Department of Crop Science University of Illinois Urbana, Illinois. CRC PR E S S Boca Raton London New York Washington, D.C.
Cover gure courtesy of Professor Juan Orellana. The gure is a metaphase-I cell of hexaploid wheat cv. Chinese Spring: chromosomes of A genome are green, chromosomes of B. In addition to autosomes, there are sex chromosomes, to be specific: X chromosome and Y chromosome. So, humans have 23 pairs of chromosomes.
Sex chromosomes The X chromosome is one of the two sex-determining chromosomes in many animal species, including mammals (the other is the Y chromosome). It is a part of the XY sex-determination system and. Genome Structure and Chromosome Function Khwaja G. Hossain, Scott A.
Jackson, and Shahryar F. Kianian Abstract Aneuploidy refers to the loss or gain of individual chromosomes or loss of a portion of an individual chromosome from the normal chromosome set. The resulting gene-dosage imbalance may or may not noticeably affect phenotype.
Southern (b), who analysed the pattern of chiasma distribution in male individuals of Myrmeleotettix maculatus both with and without B-chromosomes, showed that in this case the effect of the B-chromosome is simply to increase the frequency of bivalents carrying higher numbers of chiasmata without any alteration in the basic pattern of.
Susumu Ohno (Auth.)-Evolution by Gene Duplication-Springer-Verlag Berlin Heidelberg () - Free ebook download as PDF File .pdf), Text File .txt) or read book online for free. Great book.
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