The establishment of an organism's body plan or part of an organism with respect to the left and right halves. The pattern can either be symmetric, such that the halves are mirror images, or asymmetric where the pattern deviates from this symmetry.

The formation of mesodermal clusters that are arranged segmentally along the anterior posterior axis of an embryo.

The specification of male sex of an individual organism.

The process in which the anatomical structure of the adult male tail tip is generated and organized. In some species of rhabitid nematodes, the male tail tip undergoes a morphological change such that the most posterior hypodermal cells in the tail (hyp8-11 in C. elegans) fuse and retract anteriorly, changing the shape of the tail from a pointed, tapered cone, or spike, to a rounded, blunt dome.

The process in which the anatomical structure of the adult male tail tip is generated and organized. In some species of rhabitid nematodes, the male tail tip undergoes a morphological change such that the most posterior hypodermal cells in the tail (hyp8-11 in C. elegans) fuse and retract anteriorly, changing the shape of the tail from a pointed, tapered cone, or spike, to a rounded, blunt dome.

Any process that activates or increases the frequency, rate or extent of transcription from an RNA polymerase II promoter.

The establishment of the sex of a male organism by physical differentiation.

The process whose specific outcome is the progression of the muscle fiber over time, from its formation to the mature structure. In skeletal muscle, fibers are formed by the maturation of myotubes. They can be classed as slow, intermediate/fast or fast.

Any process that stops, prevents, or reduces the frequency, rate or extent of transcription mediated by RNA polymerase II.

The multiplication or reproduction of male germ cells, resulting in the expansion of a cell population.

Any process that modulates the frequency, rate or extent of transcription mediated by RNA polymerase II.

Any process that modulates the frequency, rate or extent of transcription mediated by RNA polymerase II.

The process whose specific outcome is the progression of the male gonad over time, from its formation to the mature structure.

The specification of male sex of an individual organism.

Any process that stops, prevents, or reduces the frequency, rate or extent of meiosis.

Any process that activates or increases the frequency, rate or extent of mitosis.

Any process that activates or increases the frequency, rate or extent of transcription from an RNA polymerase II promoter.

Any process that activates or increases the frequency, rate or extent of transcription from an RNA polymerase II promoter.

The establishment of the sex of a male organism by physical differentiation.

The establishment of the sex of a male organism by physical differentiation.

The process in which a relatively unspecialized cell acquires specialized structural and/or functional features of a Sertoli cell. A Sertoli cell is a supporting cell projecting inward from the basement membrane of seminiferous tubules.

Any process that stops, prevents, or reduces the frequency, rate or extent of transcription mediated by RNA polymerase II.

Any process that stops, prevents, or reduces the frequency, rate or extent of transcription mediated by RNA polymerase II.

Any process that stops, prevents, or reduces the frequency, rate or extent of transcription mediated by RNA polymerase II.

The multiplication or reproduction of male germ cells, resulting in the expansion of a cell population.

Any process that modulates the frequency, rate or extent of transcription mediated by RNA polymerase II.

The process of formation of spermatozoa, including spermatocytogenesis and spermiogenesis.

The process whose specific outcome is the progression of the male genitalia over time, from formation as part of the genital disc to the mature structure. An example of this is found in Drosophila melanogaster.

The process whose specific outcome is the progression of the female genitalia over time, from formation as part of the genital disc to the mature structure. An example of this is found in Drosophila melanogaster.

The process whose specific outcome is the progression of the female genitalia over time, from formation as part of the genital disc to the mature structure. An example of this is found in Drosophila melanogaster.

Any process that establishes and transmits the specification of sexual status of an individual organism.

The establishment of the sex of an organism by physical differentiation.

The behavioral interactions between organisms for the purpose of attracting sexual partners.

The behavior of a male, for the purpose of attracting a sexual partner. An example of this process is found in Drosophila melanogaster.

Locomotory behavior in a fully developed and mature organism.

The recognition of molecules at the central nervous system midline choice point by an axon growth cone; this choice point determines whether the growth cone will cross the midline.

The determination of sex and sexual phenotypes in an organism's soma.

The determination of sex and sexual phenotypes in a female organism's soma.

The neurological system process in which a signal is transmitted through the nervous system by a combination of action potential propagation and synaptic transmission.

The process in which a cell becomes capable of differentiating autonomously into a ventral spinal cord interneuron in an environment that is neutral with respect to the developmental pathway.

Progression of the genital imaginal disc over time, from its initial formation through to its metamorphosis to form the adult terminalia, comprising the entire set of internal and external genitalia and analia. Both sexes of Drosophila have a single genital disc formed from the female and male genital primordia, and the anal primordium. The anal primordium develops in both sexes, forming either male or female analia. However, only one of the genital primordia develops in each sex, forming either the male or the female genitalia.

The process during wing vibration where the male insect produces a species-specific acoustic signal called a love song.

The process whose specific outcome is the progression of the analia of the male over time, from formation to the mature structure. The analia is the posterior-most vertral appendage that develops from the genital disc. An example of this process is found in Drosophila melanogaster.

The process whose specific outcome is the progression of the analia of the female over time, from formation to the mature structure. The analia is the posterior-most vertral appendage that develops from the genital disc. An example of this process is found in Drosophila melanogaster.

The process whose specific outcome is the progression of the sex comb over time, from its formation to the mature structure. The sex combs are the male specific chaetae located on the prothoracic tarsal segment of the prothoracic leg.

Any process that stops, prevents, or reduces the frequency, rate or extent of cellular DNA-templated transcription.

Any process that activates or increases the frequency, rate or extent of cellular DNA-templated transcription.

Any process that activates or increases the frequency, rate or extent of transcription from an RNA polymerase II promoter.

The establishment of the sex of a female organism by physical differentiation.

Establishment of a pattern of pigment in one sex that is not observed in the other sex.

Any process that decreases the frequency, rate or extent of the developmental process that results in the deposition of coloring matter in an organism.

The developmental process in which the size or shape of a cell is generated and organized.

The process whose specific outcome is the progression of the ovarian follicle over time, from its formation to the mature structure.

Any process that activates or increases the rate of neuroblast proliferation.

A developmental process in which a progressive change in the state of some part of an organism specifically contributes to its ability to form offspring.

A programmed cell death process which begins when a cell receives an internal (e.g. DNA damage) or external signal (e.g. an extracellular death ligand), and proceeds through a series of biochemical events (signaling pathway phase) which trigger an execution phase. The execution phase is the last step of an apoptotic process, and is typically characterized by rounding-up of the cell, retraction of pseudopodes, reduction of cellular volume (pyknosis), chromatin condensation, nuclear fragmentation (karyorrhexis), plasma membrane blebbing and fragmentation of the cell into apoptotic bodies. When the execution phase is completed, the cell has died.

A cell cycle process comprising the steps by which a cell progresses through male meiosis I, the first meiotic division in the male germline.

The process whose specific outcome is the progression of an immature germ cell over time, from its formation to the mature structure (gamete). A germ cell is any reproductive cell in a multicellular organism.

The change in shape of the spermatid nucleus from a spherical structure to an elongated organelle, during the latter part of spermatid differentiation.

The establishment of the sex of an organism by physical differentiation.

The behavior of an adult relating to the progression of that organism along the ground by the process of lifting and setting down each leg.

The orderly movement of a cell specialized to produce haploid gametes through the embryo from its site of production to the place where the gonads will form.

The process whose specific outcome is the progression of the male gonad over time, from its formation to the mature structure.

The process whose specific outcome is the progression of the male gonad over time, from its formation to the mature structure.

The process whose specific outcome is the progression of the female gonad over time, from its formation to the mature structure.

Any process that modulates the frequency, rate or extent of somitogenesis.

Any process that modulates the frequency, rate or extent of somitogenesis.

The neurological system process in which a signal is transmitted through the nervous system by a combination of action potential propagation and synaptic transmission.

The process in which a cell becomes capable of differentiating autonomously into a ventral spinal cord interneuron in an environment that is neutral with respect to the developmental pathway.

The process whose specific outcome is the progression of the telencephalon over time, from its formation to the mature structure. The telencephalon is the paired anteriolateral division of the prosencephalon plus the lamina terminalis from which the olfactory lobes, cerebral cortex, and subcortical nuclei are derived.

The regionalization process that results in the creation of areas within the cerebral cortex that will direct the behavior of cell migration and differentiation as the cortex develops.

Generation of cells within the nervous system.

The specification of female sex of an individual organism.

The specification of male sex of an individual organism.

The process in which a signal is passed on to downstream components within the cell, which become activated themselves to further propagate the signal and finally trigger a change in the function or state of the cell.

The process in which a signal is passed on to downstream components within the cell, which become activated themselves to further propagate the signal and finally trigger a change in the function or state of the cell.

The process in which a relatively unspecialized cell acquires specialized features of a skeletal muscle cell, a somatic cell located in skeletal muscle.

Any process that modulates the frequency, rate or extent of the formation and development of teeth, the hard, bony appendages which are borne on the jaws, or on other bones in the walls of the mouth or pharynx of most vertebrates.

Any process that stops, prevents, or reduces the frequency, rate or extent of meiosis.

Any process that activates or increases the frequency, rate or extent of mitosis.

Any process that activates or increases the frequency, rate or extent of cellular DNA-templated transcription.

Any process that activates or increases the frequency, rate or extent of cellular DNA-templated transcription.

Any process that activates or increases the frequency, rate or extent of transcription from an RNA polymerase II promoter.

The establishment of the sex of a female organism by physical differentiation.

The process whose specific outcome is the progression of an oocyte over time, from initial commitment of the cell to its specific fate, to the fully functional differentiated cell.

The process in which a cell becomes capable of differentiating autonomously into a neuron in an environment that is neutral with respect to the developmental pathway. Upon specification, the cell fate can be reversed.

The process, occurring during the embryonic phase, whose specific outcome is the progression of the skeleton over time, from its formation to the mature structure.

The process in which a relatively unspecialized cell acquires specialized structural and/or functional features of a Sertoli cell. A Sertoli cell is a supporting cell projecting inward from the basement membrane of seminiferous tubules.

The process whose specific outcome is the progression of a Sertoli cell over time, from its formation to the mature structure. Cell development does not include the steps involved in committing a cell to a Sertoli cell fate.

The process in which a relatively unspecialized cell acquires specialized structural and/or functional features of a corticotropic hormone secreting cell. An corticotropic hormone secreting cell is a basophil cell of the anterior pituitary that produces corticotropin.

The specific behavior of a male organism that is associated with reproduction.

Any process that increases the rate, frequency, or extent of meiosis I, a cell cycle process comprising the steps by which a cell progresses through the first phase of meiosis, in which cells divide and homologous chromosomes are paired and segregated from each other, producing two daughter cells.

The process in which a neuroblast acquires the specialized structural and functional features of a dopaminergic neuron, a neuron that secretes dopamine.

The reproductive developmental process whose specific outcome is the progression of the seminiferous tubule over time, from its formation to the mature structure. Seminiferous tubules are ducts located in the testicles, and are the specific location of meiosis, and the subsequent creation of gametes, namely spermatozoa.

Any process that modulates the frequency, rate or extent of nodal signaling pathway.

Any process that activates or increases the frequency, rate or extent of histone H3-K9 dimethylation.

Any process that activates or increases the frequency, rate or extent of histone H3-K9 trimethylation.

Any process that activates or increases the frequency, rate or extent of male gonad development.

Any process that activates or increases the frequency, rate or extent of myotome development.

A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.

A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.

A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.

A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.

A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.

A structure found in a male mammalian spermatocyte containing an unpaired X chromosome that has become densely heterochromatic, silenced and localized at the nuclear periphery.

All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.