English Deutsch Français Italiano Español Português 繁體中文 Bahasa Indonesia Tiếng Việt ภาษาไทย
All categories

4 answers

nucleus and cell membrane!!! also sperm have lots of mitochondria :)

2007-01-16 06:56:14 · answer #1 · answered by stephizzal 5 · 0 0

Sperm do contain mitochondria, actually, in the tail section. This detaches once the sperm contacts the egg, which is why only maternal mDNA gets inherited. If they didn't have mitochondria, they would not be able to produce the energy needed to swim all the way from the release point to the egg (20-30 cm is a long way, when you're only a couple of nanometres long)

Sperm are really the simplest cells produced by the body. Their job is to deliver the father's half-complement of genes to the mother's, and all they need to accomplish that is a nucleus (containing DNA), and mitochondria (for energy) and a cell membrane (to hold everything together).

All other cells (including the egg) contain these structures, plus many others concerned with metabolism, synthesis, and specialised cell function (e.g. photoreceptors in the retina, or digestive sacs in the immune cells)

In terms of molecular structures, all cells (plant as well as animal, but not bacterial) contain DNA and histone proteins.

2007-01-16 16:06:18 · answer #2 · answered by tjs282 6 · 1 0

Sperm does have mitochondria, particularly in its tail to provide energy for the rapid motor function of "swimming". The reason mitochondrial DNA only comes from the mother is because sperm mitochondria is primarily localized to the flagella, and so when fertilization takes place, only the head fuses with the egg and the greater majority, if any, of the males mitochondria is left out as the tail does not fuse and is described by some to fall off.

But prior to fertilization, I believe mitochondria would be a good answer to what is found in other animal cells. Maybe the nucleus as well as someone has pointed out, but you have to take into account that this is now an haploid nucleus, not a diploid one. And therefore its nucleus is much different and may not count as far as this answer is concerned. Cell membrane sounds logical as well.

2007-01-16 16:03:49 · answer #3 · answered by Ms Angie 3 · 0 0

Actually, the sperm has few if ANY mitochondria.

Mitochondria is found in the ovum (egg), which is why everyone shares the same mitochondrial DNA as their mother.

http://www.newton.dep.anl.gov/askasci/mole00/mole00481.htm

2007-01-16 14:58:35 · answer #4 · answered by Reubs 3 · 0 2

fedest.com, questions and answers