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SpermatogoniaSpermatidsPachytene spermatocytesMeiosis and mitosisChromosomesSecondaryInsect spermatocyteDiploidMetaphaseSpermatogonialInterphaseUndergoesMitoticPubertyPrimaryOogoniaKinasesCytokinesisCentrosomePrometaphaseSpindleProducesOccurRegulationCell divisionMaleProductionSensitive

Spermatogonia8

• Hypophysectomy of juvenile or adult guppies completely blocks mitosis in the spermatogonia and their transformation into spermatocytes. (ubc.ca)
• From these studies it has been concluded that mitotic division of spermatogonia and their transformation into spermatocytes are dependent on pituitary, but the transformation of spermatocytes, spermatids and sperm into spermatophores are pituitary-independent. (ubc.ca)
• Spermatogonia going through mitosis to form primary spermatocytes in Grasshopper testes . (iiab.me)
• Differentiating spermatogonia in mice undergo five mitotic divisions before converting to preleptotene spermatocytes. (jci.org)
• C ) Expansion of both the undifferentiated (A spermatogonia) and differentiated (A1 spermatogonia) spermatogonial populations occurs by mitosis of these cell types, regulated in part by FSH. (jci.org)
• The process of spermatogenesis includes the formation of spermatogonia from germinal epithelium (primordial germ cell) through mitosis (multiplication phase). (ncertmcq.com)
• Adult male germline stem cells (spermatogonia) proliferate by mitosis and, after puberty, generate spermatocytes that undertake meiosis to produce haploid spermatozoa. (prinsesmaximacentrum.nl)
• This method is comprised of 4 discrete cellular events: (i) renewal of spermatogonial stem cells (SSC) and spermatogonia via mitosis and differentiation of sort B spermatogonia to pachytene spermatocytes, (ii) meiosis, (iii) spermiogenesis, and (iv) spermiation, the GLUT4 custom synthesis eventual release of spermatozoa transformed from step 19 spermatids. (adenylate-cyclase.com)

Spermatids6

• However, spermatocytes, spermatids and sperm already present in the adult testis at the time of operation transform into spermatophores. (ubc.ca)
• The process of spermatogenesis as the cells progress from spermatogium, to primary spermatocytes, to secondary spermatocytes, to spermatids and to Sperm. (iiab.me)
• Each secondary spermatocyte will form two spermatids after Meiosis II. (iiab.me)
• At the completion of meiosis, four haploid gametes, termed round spermatids, result from the division of every spermatocyte. (jci.org)
• So we will have as a result that the main spermatocyte will form four spermatids. (cassiopaea-cult.com)
• Secondary spermatocytes will divide into two spermatids that are haploid. (cassiopaea-cult.com)

Pachytene spermatocytes2

• Recombination and separation of homologous chromosomes occurs in pachytene spermatocytes during meiosis I and results in the formation of secondary spermatocytes. (jci.org)
• PHENOTYPE: Males homozygous for a hypomorphic transgenic insertional mutation exhibit impaired spermatogenesis involving loss of pachytene spermatocytes and are usually sterile. (utsouthwestern.edu)

Meiosis and mitosis2

• I'm talking about genes, DNA, genetic recombination and all that we know about meiosis and mitosis, spermatogenesis and oogenesis, genomics and epigenetics, mitochondrial DNA, ribosomes, mRNA, proteins and the like, none of which I'm particularly knowledgeable about - but surely even what I know about it all would make Darwin's head explode. (ussromantics.com)
• Canto: Right, but let's not get bogged down in the history of reproductive biology and the birth of genetics here, as it's hard enough for me to comprehend meiosis and mitosis, gametes and zygotes and all the rest, as we understand it all today. (ussromantics.com)

Chromosomes3

• Secondary spermatocytes are haploid (N) cells that contain half the number of chromosomes. (iiab.me)
• Here the initial spermatocyte, which has 46 chromosomes, is going to divide into two second-level ones. (cassiopaea-cult.com)
• In spermatocytes, chromosomes have kinetochore proteins that make end-on attachments to the spindle. (jhunewsletter.com)

Secondary7

• [1] There are two types of spermatocytes, primary and secondary spermatocytes (Figure 1). (iiab.me)
• Primary and secondary spermatocytes are formed through the process of spermatocytogenesis (Figure 3). (iiab.me)
• After Meiosis I, two secondary spermatocytes are formed. (iiab.me)
• The primary spermatocytes within the adluminal compartment will continue on to Meiosis I and divide into two daughters cells, known as secondary spermatocytes, a process which takes 24 days to complete. (iiab.me)
• First maturation division is reductional, and produces two secondary spermatocytes. (ncertmcq.com)
• each of the primary spermatocytes that are diploid separates into two haploid secondary spermatocytes. (cassiopaea-cult.com)
• It starts with secondary spermatocytes. (scientistcindy.com)

Insect spermatocyte3

• Transmission electron micrograph of cell division in an insect spermatocyte captured in late anaphase - telophase with cytokinesis in progress. (cellimagelibrary.org)
• The events of meiosis I and II in a living insect spermatocyte beginning with the breakdown of the nuclear envelope at diakinesis through to the completion of cytokinesis. (ucsd.edu)
• The events of meiosis I in a living insect spermatocyte beginning at metaphase with meiotic bivalents at the spindle equator followed by anaphase , segregation of bivalents to the spindle poles and t. (ucsd.edu)

Diploid2

• Primary spermatocytes are diploid (2N) cells. (iiab.me)
• Mitosis produces 2 diploid somatic cells that are genetically identical to each other and the original parent cells. (kegrat.online)

Metaphase1

• Altogether, our results demonstrate that PLK1 is a master regulator of the late prophase I/metaphase I transition in mouse spermatocytes. (figshare.com)

Spermatogonial3

• These cells are reserve spermatogonial stem cells which do not usually undergo active mitosis. (wikipedia.org)
• These are the spermatogonial stem cells that undergo active mitosis. (wikipedia.org)
• Although spermatocytes that divide mitotically and meiotically are sensitive to radiation and cancer , spermatogonial stem cells are not. (iiab.me)

Interphase1

• Near simultaneous fluorescence and DIC light microscopy reveals that the amount of γ-tubulin associated with the centrosome remains relatively constant throughout interphase, suddenly increases during prophase, and then decreases to interphase levels as the cell exits mitosis. (silverchair.com)

Undergoes1

• Each spermatocyte undergoes meiosis (maturation phase). (ncertmcq.com)

Mitotic2

• Each Gb initiates precisely four rounds of transit-amplifying (TA) divisions to make a cyst with 16 interconnecting germ cellular material, which leave the mitotic system in synchrony and invest in spermatocyte differentiation. (ufe-eg.org)
• An aurora kinase that localizes to the CENTROSOME during MITOSIS and is involved in centrosome regulation and formation of the MITOTIC SPINDLE. (lookformedical.com)

Puberty1

• The formation of primary spermatocytes (a process known as spermatocytogenesis) begins in humans when a male is sexually matured at puberty , around the age of 10 through 14. (iiab.me)

Primary5

• Type B cells, which undergo growth and become primary spermatocytes. (wikipedia.org)
• Primary spermatocytes are arrested after DNA synthesis and prior to division. (iiab.me)
• Finally they stop undergoing mitosis, grow and become primary spermatocytes (growth phase). (ncertmcq.com)
• Movie of meiosis I in primary spermatocytes of the crane-fly Nephrotoma suturalis that have been experimentally flattened. (ucsd.edu)
• Movie showing showing the dynamics of kinetchore microtubules during meiosis I in primary spermatocytes of the crane-fly Nephrotoma suturalis that were experimentally flattened. (ucsd.edu)

Oogonia1

• mitosis, forming oogonia. (easynotecards.com)

Kinases1

• A family of highly conserved serine-threonine kinases that are involved in the regulation of MITOSIS. (lookformedical.com)

Cytokinesis1

• HeLa cells were accumulated in monopolar mitosis using a 12 hr treatment of the kinesin-5 inhibitor S-trityl-l-cysteine and forced into cytokinesis by adding the potent Cdk1 inhibitor purvalanol A for. (cellimagelibrary.org)

Centrosome1

• The dynamic exchange of centrosome-associated γ-tubulin occurs throughout the cell cycle, including mitosis, and it does not require microtubules. (silverchair.com)

Prometaphase1

• We also found that the normal recruitment of SYCP3 and HORMAD1 to the inner centromere in prometaphase I spermatocytes did not occur. (figshare.com)

Spindle1

• Wignall found that dynein was crucial in exerting this counterbalancing inward force and limiting spindle sizes, a finding that was consistent with that in mitosis. (jhunewsletter.com)

Produces1

• Meiosis produces four cells, but mitosis produces two cells. (kegrat.online)

Occur1

• This through certain mechanisms such as mitosis and meiosis that occur in the testicles. (cassiopaea-cult.com)

Regulation2

• Aurora kinase C is a chromosomal passenger protein that interacts with aurora kinase B in the regulation of MITOSIS. (lookformedical.com)
• An aurora kinase that is a component of the chromosomal passenger protein complex and is involved in the regulation of MITOSIS. (lookformedical.com)

Cell division1

• Also known as diploids, which through mitosis, cell division, gives way to others of this type. (cassiopaea-cult.com)

Male2

• Spermatocytes are a type of male gametocyte in animals. (iiab.me)
• All male animals produce spermatocytes, even hermaphrodites such as C. elegans , which exist as a male or hermaphrodite. (iiab.me)

Production1

• What are the steps in spermatocyte production? (easynotecards.com)

Sensitive1

• Paternal sperm DNA damage has negative effects on the integrity of early embryonic development as the percentage of good quality embryos as well as implantation rates was significantly reduced in patients exhibiting high DNA damage [ 27 ] and it appears that the second and third mitoses are the sensitive periods [ 28 ]. (hindawi.com)