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Chapter 3: Problem 25

Describe the cellular differences between male and female gametes.

Short Answer

Expert verified
The main cellular differences between male and female gametes include their size, structure, quantity, function, and lifespan. The egg (female gamete) is larger, round in shape, is released in lower quantities but provides the necessary growth materials for the embryo. The sperm (male gamete) is smaller, has a unique head-midpiece-tail structure, produced in millions daily but primarily carries genetic material.

Step by step solution

01

Cellular Differences: Size

The first difference between male and female gametes is in their size. The female gamete, also known as ovum or egg, is considerably larger in size as compared to the male gamete, the sperm. The female egg is about 100 micrometers in diameter while the sperm is about 5 micrometers long.
02

Cellular Differences: Structure

The structure of the gametes also varies greatly. The sperm is made up of a head that carries the genetic material, a mid-piece filled with mitochondria and a long tail that propels the sperm. The egg on the other hand is round in shape, and contains cytoplasm and cell organelles necessary for the development of the embryo after fertilization.
03

Cellular Differences: Quantity

Another notable difference is in the quantity produced. Males produce millions of sperms each day, while females typically release one mature egg per menstrual cycle.
04

Cellular Differences: Function

The male gamete鈥檚 function is essentially to carry the DNA to the female gamete. The female gamete, however, not only carries half the genetic material required for offspring but also provides the necessary cytoplasm and organelles required for the growth and development of the embryo post-fertilization.
05

Cellular Differences: Lifespan

Sperm cells have a lifespan of up to a week inside the female reproductive system, whereas an unfertilized egg will degrade after about 24 hours.

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