Mitotic and meiotic cell cycle regulation is essential for normal development and tumor prevention. The underlying molecular mechanisms are not completely characterized. The aim of our analysis was to derive a global expression map of cell cycle regulators in mitosis and meiosis
Answer:
Cut open the plasmid and "paste" in the gene. This process relies on restriction enzymes (which cut DNA) and DNA ligase (which joins DNA).
Insert the plasmid into bacteria. Use antibiotic selection to identify the bacteria that took up the plasmid.
Grow up lots of plasmid-carrying bacteria and use them as "factories" to make the protein. Harvest the protein from the bacteria and purify it.
Explanation:
The defecation reflex involves two postive feedback loops. these loops are the stretch receptors in the rectal walls and the sacral parasympathetic system. Defecation reflex empties the rectum by peristaltic movements push fecal matter from the sigmoid colon into the rectum. Then this distension of the rectal walls stimulates stretch receptors which results in defecation.
Answer:
One Idea was the appreciation that the age of the Earth was much greater than had hitherto for been imagined.
In prophase 1:
Chromosomes become visible, crossing-over occurs, the nucleolus disappears, the meiotic spindle forms, and the nuclear envelope disappears.
In metaphase 1:
The pairs of chromosomes (bivalents) become arranged on the metaphase plate and are attached to the now fully formed meiotic spindle. The centrioles are at opposite poles of the cell.
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