In males, meiosis occurs in precursor cells known as spermatogonia that divide twice to become sperm.
Pairing between homologous chromosomes
1. photophase 2. metaphase 3. anaphase 4. telophase
Semen consists of 2 components: the sperm component and a fluid component. Sperm is produced by the testicles. The fluid component is secreted by the prostate gland, bulbourethral (or Cowper's) glands, and seminal vesicles. The fluid component provides nutrition for the sperm as well as neutralizes the acidic environement of the urethra of the penis and the vagina of the female.
1/2 the number present in the cells if the parents.
The ratio of gases evolved during the electrolysis of water is 2:1 for hydrogen gas to oxygen gas. This means that for every 2 molecules of hydrogen gas produced, 1 molecule of oxygen gas is produced.
Pairing between homologous chromosomes
1. photophase 2. metaphase 3. anaphase 4. telophase
Two are produced in Mitosis and 4 in meosis.
sperm or an egg. Each contain 1/2 the total DNA of a normal cell. The sperm and egg combine to put these two halves together and create a new DNA combination that is unique to the individual (unless they have an identical sibling/s)
2.sperm
Two types of sex cells are> Sperm (in males)> Egg or ovum (in females)Sperm is produces in the testes.Ovum or egg is produced in the ovaries.Source(s):
The two human gametes are sperm and egg (or ova). Sperm are produced by males in the testes, while eggs are produced by females in the ovaries. When these gametes unite during fertilization, they form a zygote.
An ovum from my mother and a sperm cell from my father combined to produce a zygote which ultimately produced me.
It is sperm that has 2 heads instead of 1 but, don't worry its very common!:)
Because mitosis creates duplicates of cells with complete copies of the chromosomes in each cell made. For eggs and sperm cells the cell division process has to end up with the eggs and sperm having just 1/2 of the chromosome numbers in each cell made. Eggs and sperm are therefore produced by 'meiosis' and not 'mitosis'.
1. 500 million sperm are produced and matured each day by a healthy average male 2. after a sperm has penetrated an egg the outer shell of the ovum makes it impossible for any other sperm to penetrate it. 3. the ovum is larger than sperm 4. the life span of a sperm on average is 36 hours 5. the average life span of an ovum is 12 to 24 hours
there r two types of cell in the germinal epithelium of a testicle 1.sartoli cell 2.spermatogenic cell this sartoli cell provide nutrition to the growing sperms the spermatogenic cells are the main sperm producers.the process is here - spermatogonia .. primary spermatocyte ... secondary spermatocyte ... spermatid ... sperm this is the main process.further the process go , more the cell shape is changed .the changes occur- 1.nucleus becomes bigger 2.golgi bodies degenerates but acrosome remains on the top of the head of a sperm 3.mitochondria are arranged behind the nucleus 4.the centrioles are arranged behind the mitochondria and form flagella thus a sperm is produced