In humans, fertilization involves the addition of chromosomes from the sperm and the egg. The resulting cell is called a:
Correct answer: A. Zygote
- A. Zygote
- B. Egg
- C. Embryo
- D. Fetus
Explanation
Option A is correct since the zygote is the species formed as a result of the fusion of two haploid nuclei (the sperm and the ovum). It is a fact.Option B is incorrect since the egg is the haploid cell produced in a female by an ovary, and if chromosomes are added as stated in the question, the result will be a diploid cell, not haploid.Option C is incorrect since the embryo is formed as a result of mitosis of the one cell of the zygote to form a ball of cells called the embryo.Option D is incorrect since the fetus is the correct term for the unborn baby inside the uterus of the mother.
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About Reproduction
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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