Search results
Results from the WOW.Com Content Network
Diagram showing the reduction in number of the chromosomes in the process of maturation of the ovum; the process is known as meiosis Main article: Oogenesis The formation of an oocyte is called oocytogenesis, which is a part of oogenesis. [ 1 ]
Oogenesis starts with the process of developing primary oocytes, which occurs via the transformation of oogonia into primary oocytes, a process called oocytogenesis. [11] From one single oogonium, only one mature oocyte will rise, with 3 other cells called polar bodies.
You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made.
Diagram of a human egg cell Ovum and sperm fusing together The process of fertilizing an ovum (top to bottom). In all mammals , the ovum is fertilized inside the female body. Human ova grow from primitive germ cells that are embedded in the substance of the ovaries .
Oocytogenesis : third trimester primary Oocyte: diploid/46: 4C: Ootidogenesis (meiosis 1) (Folliculogenesis) -- polar body separated: Dictyate in prophase I until ovulation secondary Oocyte: haploid/23: 2C: Ootidogenesis (meiosis 2) -- polar body separated: Halted in metaphase II until fertilization Ootid: haploid/23: 1C: Maturation: Minutes ...
Each element has a specific function in the multi-step process of gene expression. The sequences and lengths of these elements vary, but the same general functions are present in most genes. [ 2 ] Although DNA is a double-stranded molecule, typically only one of the strands encodes information that the RNA polymerase reads to produce protein ...
Functions of the cumulus oophorus include coordination of follicular development and oocyte maturation. [2] Mechanisms of the latter include stimulation of amino acid transport and sterol biosynthesis and regulation of oocyte gene transcription. [2] It also provides energy substrates for oocyte meiotic resumption and promotes glycolysis. [2]
One can subdivide chemical compounds into two main groups: molecules, which includes most organic, polyatomic gases, and organometallic compounds, and nonmolecular species, which includes most purely inorganic compounds. The structures of many reagents are often misunderstood because simplified formulas are presented in reaction schemes whereas ...