An egg is the female reproductive cell, which is fertilized by the male reproductive cell, that is, the sperm. Gametes are haploid cells (23 chromosomes), that is, they have half the number of chromosomes than other cells, which are diploid (46 chromosomes). The fusion between both reproductive cells (male and female) gives raise to a zygote (diploid cell, 46 chromosomes), in which we can find a female pronucleus (23 chromosomes) and a male pronucleus (23 chromosomes).
Read the full article on: What’s the Difference Between Zygote, Embryo & Fetus? ( 33).
Aitziber Domingo Bilbao
B.Sc., M.Sc.
Bachelor's Degree in Biology from the University of the Basque Country. Master's Degree in Human Assisted Reproduction from the Complutense University of Madrid, and Master's Degree in Biomedical Research from the University of the Basque Country. Wide experience as an Embryologist specialized in Assisted Procreation.
