A. Size and Structure - sperm, the smallest cell within the human body, are only a few micrometers long. It is composed of a head, midpiece, and tail. Within the head are the nucleus, condensed DNA containing 23 chromosomes, and the acrosome. The acrosome is located at the end of the head and is considered a modified lysozome containing digestive enzymes that are capable of breaking through the outer layer of an egg. The midpiece of the sperm contains mitochondria that produce the energy for the tail to move. The tail is a flagella composed of microtubules. The sole purpose of a sperm cell is to deliver its head to the egg.
The female's egg (ova), is the largest cell within the human body, measuring roughly 1/10 of a millimeter. It's central …show more content…
Formation Site - sperm cells are formed in the seminiferous tubules of the testes. Ova are formed in the ovary follicle.
C. Cell Division Process - spermatogonia (germ) cells undergo meiosis to produce sperm cells. Oogonia (germ) cells undergo meiosis to produce …show more content…
During this process it goes from stem cell to prophase | of meiosis. This process occurs 6 months prior to birth when the stem cells differentiate and begin meiosis. These stem cells reach the beginning of prophase |, start synapsis and crossing over, and there remain at this phase for years. Meiosis is completed during ovulation. The ova is the half of the split nucleus that is larger and contains the majority of the cytoplasm, the other half is the polar body. At completion, three polar bodies have been formed.
One stem cell results in one ova within the female, and four sperm cells within the male.
E. Number of Functional Gametes Formed by a Single Cell Division - for sperm, four gametes are formed by each cell division during meiosis. For ova, only one functional gamete is produced during meiosis, along with three polar bodies.
F. Number of Germ Cells Available to Produce Gametes - male's possess an unlimited supply of germ cells. Spermatogonia divide continuously by mitosis throughout the person's lifetime. Females possess a limited a limited number of stem cells that are converted to ova in prophase |. They possess roughly two million at birth, but only approximately 400,000 remain once the female has reached
The female's egg (ova), is the largest cell within the human body, measuring roughly 1/10 of a millimeter. It's central …show more content…
Formation Site - sperm cells are formed in the seminiferous tubules of the testes. Ova are formed in the ovary follicle.
C. Cell Division Process - spermatogonia (germ) cells undergo meiosis to produce sperm cells. Oogonia (germ) cells undergo meiosis to produce …show more content…
During this process it goes from stem cell to prophase | of meiosis. This process occurs 6 months prior to birth when the stem cells differentiate and begin meiosis. These stem cells reach the beginning of prophase |, start synapsis and crossing over, and there remain at this phase for years. Meiosis is completed during ovulation. The ova is the half of the split nucleus that is larger and contains the majority of the cytoplasm, the other half is the polar body. At completion, three polar bodies have been formed.
One stem cell results in one ova within the female, and four sperm cells within the male.
E. Number of Functional Gametes Formed by a Single Cell Division - for sperm, four gametes are formed by each cell division during meiosis. For ova, only one functional gamete is produced during meiosis, along with three polar bodies.
F. Number of Germ Cells Available to Produce Gametes - male's possess an unlimited supply of germ cells. Spermatogonia divide continuously by mitosis throughout the person's lifetime. Females possess a limited a limited number of stem cells that are converted to ova in prophase |. They possess roughly two million at birth, but only approximately 400,000 remain once the female has reached