Reproductive System and Development MCAT Review. Reproductive System. Male and female reproductive structures and their functions. Seminiferous tubules, Epididymis, Vas deferens, Ejaculatory duct, nothing, Urethra, Penis. Gametogenesis by meiosis. Male spermatogenesis occurs in the seminiferous tubules. Figure_43_03_06.jpg' alt='Difference Between Gametogenesis And Embryogenesis' title='Difference Between Gametogenesis And Embryogenesis' />Spermatogonium 2n stem cell. Mitosis of spermatogonium can either create more spermatogonium or create primary spermatocyte. Spermatogonium 2n mitosis primary spermatocyte 2n. Occurs after puberty. Primary spermatocyte 2n meiosis I Secondary spermatocyte n. Secondary spermatocyte n meiosos II spermatid n. Spermatid n mature sperm n. The fancy name for sperm is spermatozoa. Difference Between Gametogenesis And Embryogenesis Pdf' title='Difference Between Gametogenesis And Embryogenesis Pdf' />Female oogenesis occurs in the ovaries, then fallopian tubes. Oogonium 2n stem cell. Oogonium 2n mitosis primary oocyte. Primary oocyte 2n arrests at prophase I occurs before birth. Difference Between Gametogenesis And Embryogenesis In PlantsDifference Between Gametogenesis And Embryogenesis Of PersistentIn biology and genetics, the germline in a multicellular organism is the population of its bodily cells that are so differentiated or segregated that in the usual. Resveratrol induces mitochondrial biogenesis and protects against metabolic decline, but whether SIRT1 mediates these benefits is the subject of debate. To circ. Origin of Flowering Plants, Origin of Angiosperms, Triassic Origin of Angiosperms, Paraphyletic Origin of Flowering Plants, Coevolutionary Hypothesis. Issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Easily share your publications and get. Insects display a wide variety of sexual dimorphism between taxa including size, ornamentation and coloration. The femalebiased sexual size dimorphism observed in. Reproductive System and Development MCAT Review and MCAT Prep. One comes out of arrest every month between puberty and menopause. Primary oocyte 2n meiosis I secondary oocyte n. Ruptures from ovary follicle into the fallopian tube. Secondary oocyte n arrests at metaphase II. Comes out of arrest if fertilization occurs. Secondary oocyte n meiosis II ovum n. Ovum and sperm. differences in formation. Male and female gametogenesis side by side. Male. Female. Difference. Difference Between Gametogenesis And Embryogenesis In Drosophila' title='Difference Between Gametogenesis And Embryogenesis In Drosophila' />Spermatogonium 2nOogonium 2nSpermatogonium renews its population by mitosis throughout life. Oogonium stops renewing its population sometime before birth. Primary spermatocyte. Primary oocyte. Primary oocye arrests at prophase ISecondary spermatocyte. Gray9.png' alt='Difference Between Gametogenesis And Embryogenesis' title='Difference Between Gametogenesis And Embryogenesis' />Secondary oocyte. Secondary oocyte arrests at metaphase IISperm. Ovum. Between the secondary spermatocyte and the sperm, theres the spermatiddifferences in morphology. Sperm motile flagella. Egg non motile round. Sperm contributes DNA only the egg actively destroys sperm mitochondria. Egg contributes DNA everything else mitochondria, organelles, epigenetics. Reproductive sequence fertilization, implantation, development, birth. Switch from getting oxygen from moms blood breathing. Switch from getting nutrients from moms blood suckling. Fetal circulation which bypasses lungs and liver normal circulation by closing off ducts and opennings. Embryogenesis. Stages of early development order and general features of each. Sperm meets egg. Acrosomal reaction causes sperm to penetrate egg. Cortical reaction causes egg to prevent additional sperm from penetrating. Egg completes meiosis II. Sperm and egg nuclei fuse. Normal mitotic cell divisions cell grows then divides, grows again, then divides. Cleavage mitotic divisions without cell growth. Cells from the surface migrate inwards. Some by invagination, some by migration, some by splitting. In mammals, the cells start migrating inward at the primitive streak. The cells that migrate inwards form the endoderm. The cells that remain outside is the ectoderm. The cells in the middle are the mesoderm. Major structures arising out of primary germ layers. Developmental Mechanisms. Cell specialization commitment followed by differentiation. The commitment can be reversed at this stage. Epithelial skin, lining of organs. Connective blood, bone, tendons, ligaments, cartilage. Nervous brain, spinal cord, nerves. Muscle skeletal, smooth, and cardiac muscle. Windows 8 For Hp more. Cell communication in development. Induction one group of cells changing the behavior of an adjacent group of cells. For example, the optic vesicle is able to induce the ectoderm to develope into lens. Another example is the induction of wing feathers in the chick by the dermal mesenchyme. Induction mechanisms physical touching of cells juxtracine or by releasing chemicals paracrine. Gene regulation in development. Differential gene transcription. DNA methylations can shut off or turn on genes. DNA can shut off or turn on genes. Differential RNA processing. RNA make it outside the nucleus to be translated. RNA. Translation regulation. RNA are made to last longer than others more proteins translated off of it, and some are made to be rapidly degraded less proteins translated off of it. RNA in the oocyte. Get translated only when needed after fertilization. Post translational regulation. Programmed cell death. During apoptosis, strong proteases are activated and they digest the cell from within. In mammals, the proteases are called caspases. The spaces between our fingers are created by apoptosis. The tail of a tadpole undergoes apoptosis when it morphs into a frog.