百度试题 结果1 题目How many times does DNA copy during meiosis? A. 1 B. 2 C. 3 D. 4 相关知识点: 试题来源: 解析 A 反馈 收藏
How many somatic cells are produced in mitosis?Cell Division:Mitosis is the process of somatic cells dividing. Cells must divide to replace old, dying cells, and for the organism to grow. Mitosis is a highly regulated process to ensure exact copying of the DNA....
How many autosomes are in a haploid human cell? How many autosomes and sex chromosomes do gametes have? How many diploid cells do humans have? How many chromosomes are in a cell at the beginning of meiosis? How many pairs of chromosomes are found in a typical human somatic cell's kary...
What cell is formed after meiosis 1? However, Meiosis I begins with one diploid parent cell and ends withtwo haploid daughter cells, halving the number of chromosomes in each cell. Meiosis II starts with two haploid parent cells and ends with four haploid daughter cells, maintaining the number...
Essential mitotic functions of DNA topoisomerase IIα are not adopted by topoisomerase IIβ in human H69 cells. J. Biol. Chem. 273, 33660–33666 (1998). Article CAS PubMed Google Scholar Peng, H. & Marians, K. J. Escherichia coli topoisomerase IV. Purification, characterization, subunit ...
With the intensification of the greenhouse effect, a series of natural phenomena, such as global warming, are gradually recognized; when the ambient temperature increases to the extent that it causes heat stress in plants, agricultural production will in
and lungs are all beginning to function. The fingers and toes are separate and the external genitalia are formed. At 12 weeks, the fetus is about three inches long and weighs about one ounce. At the end of the first trimester, many pregnant women find that their clothes are getting tight...
Many cellular IRESs are activated upon stress, whereas some are required in regular physiological conditions. Cellular IRESs tend to integrate or interact with RNA chaperones, upstream open reading frames and/or G-quadruplex structures for function. The initiation factor eIF3 can have a specialized ...
With the intensification of the greenhouse effect, a series of natural phenomena, such as global warming, are gradually recognized; when the ambient temperature increases to the extent that it causes heat stress in plants, agricultural production will in
In the process of meiosis, how many viable eggs are produced by the female each time meiotic cell division occurs? Meiosis: Meiosis is the process by which a diploid cell (2n) undergoes division and produces a haploid cell (n). The cells which ...