cực cầu
Definition
- Noun (Biology, Cytology):
- Polar body: A small, non-functional cell produced during the process of oogenesis (egg cell formation) in female animals. It is formed as a result of asymmetric cell division and contains excess genetic material, allowing the primary oocyte or secondary oocyte to retain most of the cytoplasm.
Usage Examples
- Noun:
- Trong quá trình giảm phân, noãn bào đã giải phóng một cực cầu. (During meiosis, the oocyte released a polar body.)
- Cực cầu thứ nhất thường sẽ phân chia tiếp. (The first polar body will usually divide further.)
Advanced Usage
"cực cầu thứ nhất": first polar body.
- Cực cầu thứ nhất được hình thành sau lần phân chia giảm phân I. (The first polar body is formed after the first meiotic division.)
"cực cầu thứ hai": second polar body.
- Sự thụ tinh kích thích sự hình thành cực cầu thứ hai. (Fertilization stimulates the formation of the second polar body.)
Variants and Related Words
- Thể cực: A less common synonym for "cực cầu," also meaning polar body.
- Noãn bào (n): Oocyte, the cell that undergoes division to form the polar body.
- Giảm phân (n): Meiosis, the type of cell division involved in polar body formation.
Synonyms
- Polar body: The direct and primary English equivalent.
Related Biological Terms
- Oogenesis: The process of egg cell development in which polar bodies are produced.
- Asymmetric division: A cell division that produces daughter cells of unequal size, a key feature in polar body formation.