細胞分裂：练习题

Where is the genetic material (DNA) located in a eukaryotic cell?

Tumours result from the abnormal, uncontrolled growth of cells. Which statement correctly describes a malignant tumour?

Which of the following correctly compares the outcomes of mitosis and meiosis?

During which process does a body cell divide to form two genetically identical daughter cells for growth and repair?

In medical research, stem cells from human embryos are often considered more versatile than stem cells from adult bone marrow. Why is this the case?

State two reasons why body cells in multicellular organisms divide by mitosis.

Compare the daughter cells produced by mitosis with those produced by meiosis in terms of their genetic similarity to the parent cell.

Explain the biological basis of therapeutic cloning and why the resulting cells are advantageous for medical treatment.

Cells divide by two different processes: mitosis and meiosis.
(a) Compare mitosis and meiosis by stating:
i. The number of daughter cells produced by each process.
ii. Whether the daughter cells are genetically identical or different.
(b) In which part of the human body does meiosis occur, and what is the purpose of this type of cell division?

Stem cells have the potential to revolutionise medicine.
(a) Describe the difference between embryonic stem cells and adult stem cells found in bone marrow in terms of their ability to differentiate.
(b) Explain the process of 'therapeutic cloning' and discuss why this technique is used to prevent the rejection of transplanted tissues.
(c) Give one social or ethical argument against the use of embryonic stem cells in medical research.