In 'cloning', nucleus is introduced into which of the following?
Correct answer: B. Egg cell
- A. Somatic cell
- B. Egg cell
- C. Sperm cell
- D. Zygote
Explanation
Option B is correct since in animals and especially among vertebrates, a nucleus from somatic cells is removed and introduced into an egg cell, whose own nucleus is destroyed by ultraviolet radiations.Moreover, through this method, the egg develops into an organism, genetically identical to the parent who has contributed the nucleus.
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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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