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why do sperm cells have many mitochondria

Eggs (ova) and sperm have half the number of chromosome One of the rod shaped bodies found in the nucleus of cells that contain genetic information (DNA). of normal body cells. They are called
haploid cells rather than diploid An organism or cell that contains two copies of each chromosome. cells. A single egg cell is called an ovum. Collectively, eggs and sperm are called gametes or sex cells. When fertilisation occurs, an egg (ovum) and a sperm fuse to form a zygote. Eggs and sperm have several important adaptations linked to their structure. An egg cell (ovum) is one of the largest cells in the human body and can just be seen without using a microscope. Each egg cell has a haploid nucleus - containing only half the number of chromosomes of a normal cell nucleus.


It has a large cytoplasm which contains the nutrients and mitochondria Structures in the cytoplasm of all cells where respiration takes place (singular is mitochondrion). needed for mitosis (cell division) after fertilisation. And each egg has a special cell membrane which only allows one sperm to fertilise it. Each sperm cell also has a haploid nucleus. It has a tail (for motility The ability to move from one place to another. ) which propels it through the cervix In a human, the cervix is the neck of the womb, where the vagina joins the uterus. , uterus Also known as a womb.


This is where the fertilised egg (ovum) develops. and fallopian tube The tube leading from the ovary to the uterus. towards the egg. And each one has many mitochondria (where respiration Chemical change that takes place inside living cells, which uses glucose and oxygen to produce the energy organisms need to live. Carbon dioxide is a by-product of respiration. occurs) to release the energy needed for its journey. Sperm cells also have special enzyme Proteins which catalyse or speed up chemical reactions inside our bodies. Enzymes are a vital in chemical digestion of food in the gut. , called acrosomes, which allow them to break through the cell membrane of the egg.


The answer there would be C. Sperm only need a certain amount of mitochondria, but they happen to have a huge excess. The reason is obvious once you think. The answer there would be C. Sperm only need a certain amount of mitochondria, but they happen to have a huge excess. The reason is obvious once you think about it. The sperm with mutated genes for an excess in mitochondria would be able to produce more ATP (energy) than it s normal brothers, and so would be more likely the one to reach the egg and pass on its excess mitochondria genes. It s a massive race. Only the fastest survive, so they have as many mitochondria as they can fit.

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