The union of ovum and sperm is called fertilization.<\/p>\n
Normally, fertilization takes\u00a0place in the outer one-third of the fallopian tube shortly after ovulation (the discharge of\u00a0ovum from the mature follicle) and insemination (introduction of the male’s seminal fluid\u00a0into the female’s vagina).<\/p>\n
a. Zygote<\/strong>. To penetrate the ovum, the sperm releases the enzyme\u00a0hyaluronidase that makes the surface of the ovum more permeable.<\/p>\n The sperm enters\u00a0the ovum. The nuclei of the sperm and the ovum fuse, making the process of\u00a0fertilization complete. A new cell, called the zygote, has been made. The zygote cell\u00a0has 46 chromosomes and all the potentials of the new individual: sex, size, hair color,\u00a0eye color, etc.<\/p>\n b. Cell Divisions<\/strong>. The zygote begins mitotic cell divisions within the space of\u00a0hours after the zygote has formed. As a result of these divisions, this new zygote cell is\u00a0soon a fluid-filled ball of cells.<\/p>\n","protected":false},"excerpt":{"rendered":" The union of ovum and sperm is called fertilization. Normally, fertilization takes\u00a0place in the outer one-third of the fallopian tube shortly after ovulation (the discharge of\u00a0ovum from the mature follicle) and insemination (introduction of the male’s seminal fluid\u00a0into the female’s vagina). a. Zygote. To penetrate the ovum, the sperm releases the enzyme\u00a0hyaluronidase that makes the … Continue reading 1-11. FERTILIZATION<\/span>