Which of the following statements is true of clones?
Correct answer: B. Clones have DNA identical to parent
- A. Clones show variation
- B. Clones have DNA identical to parent
- C. Clones are formed by meiotic division
- D. All the choices are incorrect
Explanation
Yes, in the context of biological cloning, such as in the case of reproductive or somatic cell cloning, the DNA of the cloned individual is typically identical to that of the parent organism. This is because cloning involves the replication of the genetic material, specifically the DNA, of the parent organism to create a genetically identical copy. There are different methods of cloning, and one common approach is somatic cell nuclear transfer (SCNT). In SCNT, the nucleus of a somatic (body) cell from the organism to be cloned is transferred into an egg cell that has had its nucleus removed. This reconstructed egg, containing the genetic material of the donor organism, is then stimulated to divide and develop into a new organism. There are different methods of cloning, and one common approach is somatic cell nuclear transfer (SCNT). In SCNT, the nucleus of a somatic (body) cell from the organism to be cloned is transferred into an egg cell that has had its nucleus removed. This reconstructed egg, containing the genetic material of the donor organism, is then stimulated to divide and develop into a new organism.
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Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.
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