Answer: 23.
- A 46
- B 23
- C 22
- D 24
Correct answer: B. 23
Explanation: Human sperm cells are haploid, containing 23 chromosomes (22 autosomes + 1 sex chromosome, either X or Y). When sperm (23) fuses with egg (23), the resulting zygote has 46 chromosomes (diploid).
The human male reproductive system: sperm formed in the testis mature in the epididymis and travel via the vas deferens, mixing with secretions of the seminal vesicle, prostate and bulbourethral glands. Image: Wumingbai, CC BY-SA 4.0, via Wikimedia Commons.
Concept context
Male and female reproductive systems, gametogenesis, fertilization, implantation, pregnancy, and reproductive health.