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Nuclei in Biological Dictionary

Pollen grain

... ... Each pollen grain contains two sperm nuclei and one tube nucleus. ... ... pollen , ... ... Each pollen grain contains two sperm nuclei and one ... Each microspore develops by ... grow a tube ... grain with the egg and polar nuclei is to get pollen ger ... A hard coat ...

Polar nuclei

... ... sperm combines with the two polar nuclei of the large central cell of ... The remaining two nuclei , called polar nuclei , share the cytoplasm of the large ... ... ...

Nucleoli

... manufacture the subunits ... Mammalian nuclei usually contain between 1-4 nucleoli . ... ... used to measure morphometric characteristics of nuclei and nucleoli of hepatocytes from pejerrey ... cell type, nucleoli , nuclear contours, ... nuclei and prominent nucleoli and usually were more ......

Megagametophyte

... . Potentilla nivea. ... megaspore nuclei (arrows) enter the megagametophyte tubes as ... megagametophyte . ... The fusion of two sperm nuclei with megagametophyte nuclei is called double fertilization. ... ...

Heterokaryon

... A medical example is a heterokaryon composed of nuclei from Hurler syndrome and Hunter syndrome. Both ... A medical example is a heterokaryon composed of nuclei from Hurler syndrome and ... Online Medical ... ... Heterokaryon : A cell with two separate nuclei formed by the experimental fusion ... What Is ...

Diploid nuclei

... to ... include the production of diploid nuclei in a heterokaryotic, haploid mycelium ... Haploidization (not meiosis) of some diploid nuclei (Fig. 4) ... This is also a rare event, occurring in diploid nuclei , once, in 500 mitoses. ... A nucleus is ...

Cardiac muscle

... junctions ... Many more cardiac muscle cell nuclei are visible. ... Cardiac (Heart) Muscle ... . ... present in cardiac muscle . ... located nuclei of cardiac muscle . ... A. Functional ... Skeletal Muscle . Longitudinal. Peripheral nuclei ... Cardiac Muscle . Longitudinal. ...

Telophase

... during which the chromosomes of daughter cells are grouped in new nuclei ... during telophase ? Read ... telophase the final stage of ... In telophase , the chromosomes are cordoned off into distinct new nuclei in the emerging daughter cells. Psychology research, information, ...

Syncytium

... syncytium ? ... syncytium a mass of cytoplasm containing several nuclei and enclosed in a membrane but no internal cell boundaries (as in muscle ... ... This produces a multinucleate cell ( syncytium ) such as ... The nuclei are in a syncytium , that is, there are no cell boundaries, and the ... ...

Sieve tubes

... in a ... Sieve - tubes are remarkable in that their cells lack nuclei when mature. ... Information about Sieve tubes in the free online ... elongated living cells ( sieve - tube elements) of the phloem, the nuclei ... About 4 or 5 years after planting, the older food-conducting sieve ...

Macronucleus

... for conjugation and autogamy (reproduction by exchange between the nuclei of different individuals and of the same ... macronucleus ... macronucleus /mac·ro·nu·cle·us/ (-noo'kle-us) the larger of two types of nuclei ... ...

Haploid gametophyte

... haploid gametes (eggs and sperm) ... combines with two haploid nuclei of the female gametophyte , to form a triploid ... In plants, gametes ... Isomorphic ... ... in a diploid sporophyte; plants have haploid nuclei during the gametophyte phase. ... The gametophyte has only the ...

Euchromatin

... DNA, RNA, and protein that makes up chromosomes. It is found inside the nuclei of eukaryotic cells, and within the nucleoid in prokaryotic cells. It is ... cell has very little euchromatin , and very scanty cytoplasm. ... has nuclei which are mostly euchromatin . If you're really curious, this is ... ...

Chromatin

... DNA, RNA, and protein that makes up chromosomes. It is found inside the nuclei of eukaryotic cells, and within the nucleoid in prokaryotic cells. It is ... ... Chromatin is the complex of DNA and protein found inside the nuclei of ... Chromatin structure is also relevant to DNA replication ... ...

Blastomeres

... of cell divisions that ... Blastomeres were ablated by pulsing the nuclei with a laser beam from a model ... The mean percentages of ... ... Cells derived from the labeled blastomeres are shown in green; nuclei were ... entoblast ( ) n. Any of the blastomeres of an embryo from ...

Thalamus

... Brain: Thalamus MRI cross-section of human brain, with thalamus marked. ... The thalamus surrounds the third ventricle. ... Nearby nuclei or structures left blank are not parts of thalamus . ... The thalamus is a paired structure joined at the midline and sitting very near ... Get ...

Syngamy

... ... syngamy - 5 ... ... syngamy – Our zoology dictionary has ecology, physiology, genetics of syngamy , ... syngamy The union of nuclei of two gametes to produce a zygote nucleus, ... Pronunciation of syngamy . syngamy synonyms. syngamy usage examples and syngamy quotes. ...

Spermatids

... were collected from the testicles of rats of both groups, the ... ( t) Newly formed Sa spermatids of stage I have the smallest spherical nuclei of ... ( y) The nucleus of Sc spermatids in stage VI has shortened to the typical length ... Silver grains are localized in elongating ...

Spermatid

... Rattus norvegicus spermatid perinuclear RNA binding protein (Strbp), mRNA. PA ... As spermatid elongation proceeds, the rostral ends of the nuclei bundle (NB) ... Prior to this, each spermatid sheds a residual body containing membrane ... A round spermatid was drawn into the injection ...

Sister chromatid

... ... The knowledge on sister - chromatid cohesion is based mainly on investigations in ... 2005), but sister - chromatid alignment in 4C nuclei was not investigated. ... However, the cohesion between sister chromatids is ultimately destroyed at the ... The dependency of sister ...

Satellite DNA

... ... PLoS ONE: an inclusive, peer-reviewed, open-access resource from the PUBLIC ... Some satellite DNA transcripts were found exclusively in nuclei such as D. ... ... satellite DNA is ... pattern of micro- satellite DNA repeat sequences is essentially ... Satellite DNA from the Y ...

Purkinje fibers

... term. What does Purkinje fibers ... ask a question about Purkinje fibers . How to thank TFD for ... purkinje fiber ... vestibular nuclei and Purkinje fibers from the cerebellum are ... and wind up in the Purkinje Fibers which cause the ventricle to contract. ... For the ...

Protons

... dictionary with ... Protons make up part of the nucleus of all atoms except ... Protons .com ... 2 Protons and neutrons. 3 Forces. 4 Halo nuclei and strong force range limits. 5 Nuclear models ... In the nucleus, the two protons are shown in red and ... The positive charge of the nucleus ...

Protist cell

... ... pumps excess water out of many freshwater protist cells . ... Developed by Baylor College of Medicine, BioEd Online provides up-to-date ... nuclei are found in plant, animal and protist cells . ... BioMEDIA ASSOCIATES, The goal of this program is to show a representative sample of the ...

Prometaphase

... ER interlaced with clusters of ... During prometaphase I, the outer kinetochore protein, HIM-10 (A, red), co ... B) Mitosis produces new nuclei with exactly the same chromosomal endowment as ... All of the following occur during prometaphase of mitosis in animal cells except ... ...

Polar body

... body definition ... Information about Polar bodies in the free online English ... polar body ... A polar body contains one of the nuclei derived from the first or second meiotic ... Makers of the Polar brand wristwatch heart rate monitors. ... The best way to fine-tune your ...

Pachytene

... requires Sum1, a transcriptional repressor ... NDT80 is required for exit from pachytene (Xu et al., 1995) ... Staging of pachytene nuclei based on the morphology of the XY pair with BRCA1 ... We suggest that the pachytene phenotype develops secondarily to a primary defect ... ...

Oviduct

... -- Ciliated Epithelium of Oviduct . Cilia are a surface adaptation ... Oviduct epithelium features occasional cells with large slender nuclei and very ... The oviduct is an exquisitely designed organ that functions in picking-up ... Click the link to view a video of this complex ...

Optic lobes

... mRNA (cDNA clone IMAGE: ... Britannica online encyclopedia article on optic lobe (anatomy), ... of the brain stem. Sensory and motor nuclei for cranial nerves extend from the hindbrain ... ... online dictionary with pronunciation, synonyms, and translation of Optic lobe . ... ...

Muscle

... and change the size of the cell. They ... Main article: Muscle ... Skeletal muscle fibers are also multinucleated, with the cell's nuclei located ... section of skeletal muscle is called a sarcomere ... Muscle , tissue or organ of the animal body characterized by the ...

Midbrain

... (or midbrain ) comprises the tectum, tegmentum, the ventricular mesocoelia (or "iter"), and the cerebral peduncles, as well as several nuclei and fasciculi. Caudally the ... The midbrain tegmentum is the part of the midbrain extending from the substantia nigra to the ...

Micronucleus

... the micronucleus test, animals are treated with a chemical and then the ... micronucleus n. , pl. -clei ( ) or -cleuses . The smaller of two nuclei in ciliate protozoans that contains genetic material and functions in HCS Reagent Kit for 3-parameter analysis of micronucleus (MN) formation. ...

Megabase

... catalog. ... Although the protoplast method yields megabase -size DNA of high quality, the ... Preparation of Megabase -size DNA from Plant nuclei ... megabase . Definition from Wiktionary, a free dictionary. Jump to: navigation, search ... Retrieved from "http://en.wiktionary.org /wiki/ ...

Leptotene

... homologs had completely ... leptotene (E) ... ( B) Leptotene -zygotene transition (a one-tenth projection, showing ... pam1 maize meiocyte nuclei in leptotene through pachytene stages. ... ( A) Leptotene . ... During leptotene , homologs move towards each other in what is termed ...

IS element

... about IS element . Q. what consider to be a good ... element ... An element is uniquely determined by the number of proton s in the nuclei of its ... 2) In mathematical set theory, an element is a member of a set. ... Element - Definition of Element at Dictionary.com a free ...

Interkinesis

... A pause between two phases of meiosis. ... Very rarely, polyploid mutants ... Between telophase I and interkinesis , about ... interkinesis nuclei were certainly unbalanced with regard to both chromo ... The period in between the two meiotic divisions is defined as interkinesis , ... in ...

Hypothalamus

... The hypothalamus is a portion of the brain that contains a number of small nuclei with a variety of functions. One of the most important functions of the hypothalamus is to link the nervous system to the endocrine system .....

Hindbrain

... |Reinforced Hardcover|7 - 9|Gray Matter|Carl Y. Saab|Chelsea House Pub The Hindbrain Books Many of the mature hindbrain nuclei can occupy either one or several rhombomere-derived regions. ... in a developing hindbrain also have distinct functions ... The hindbrain is ...

Germline

... Molecular ... WormAtlas: A database of behavioral and structural anatomy of Caenorhabditis elegans. ... GermFIG 3A-D - Germ-line cell. nuclei morphologies in meiotic. prophase 1 ... Online Shopping at DirectTextBook.com - Save up to 80%, buy or rent. New and used books like Germ Line ...

Germ line

... Molecular ... 5 Germ-line development. 6 Spermatogenesis and spermiogenesis. 7 References. Figures ... GermFIG 3A-D - Germ-line cell. nuclei morphologies in meiotic. prophase 1 ... Find the lowest price for GermLine by Nelson Erlick - (Mass Market Paperback), ISBN 9780765340313. Buy ...
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