Why is an egg cell so much bigger than a sperm cell?

Answer 1

Since at the time of oogenesis (in females).. after meiosis I the oocytes gets divided and leads to the formation of a primary oocyte and a polar body.. after that, the primary oocyte again divide and then forms secondary oocyte (ovum or egg) and two polar bodies.. now the total no. of polar bodies are three and these three polar body submitt there cytoplasm to the secondary oocyte.. which then become large.. On the other hand, at the time of spermtogenesis (in males) formation of sperms does not lead to formation of any polar body. Rather the sperms gets fully mature by themselves.. That's why the size of the egg or ovum is larger than sperm.

Answer 2

The size of egg is larger than sperm because the the sperm enters inside the egg and egg has to accommodate the sperm. And egg contains fats and nutrients in order to feed zygote in case of pregnancy.

Answer 3

If there was more eggs, then there would be like 1,000,000 kids. There are alot of sperm because most of the sperm will die trying to find the egg within 2 days. So there is usually only one or to sperm that finds the egg. Sources:

Mr.Kushner;)

Answer 4

the egg cell is bigger because there is some "food" for the early start of fertilization of live on in it's early days.

Answer 5

Sperms need to swim all the way to the egg cell,if the sperm is bigger,how can it penetrates inside the egg cell,and how can it develop inside the woman's womb.

Answer 6

It is considerably smaller, for one thing. But besides that, a sperm cell is essentially a delivery package for DNA; the egg cell, once fertilized, does the rest of the work.

Answer 7

I think it has something to do with how they are made

Answer 8

An egg cell contains nutrients necessary to begin development. Also it's much easier to hit a large target than a small one.