What is the major difference between a human skin cell and a human egg cell?

Options

A. The egg cell has twice as many chromosomes as the skin cell.
B. The egg cell has half as many chromosomes as the skin cell.
C. The skin cell has no genetic information in its chromosomes.
D. Only the egg cell has a nucleus.

Explanation

To answer the question about the major difference between a human skin cell and a human egg cell, we can follow these steps:

### Step 1: Understand the Chromosome Number
- Human skin cells are somatic cells, which means they contain a full set of chromosomes. In humans, this is represented as 2N (diploid), meaning they have 46 chromosomes (23 pairs).
- Human egg cells, on the other hand, are gametes. They are produced through a process called meiosis, which reduces the chromosome number by half. Therefore, human egg cells have N (haploid), meaning they contain 23 chromosomes.

### Step 2: Compare the Chromosome Numbers
- Since skin cells have 2N (46 chromosomes) and egg cells have N (23 chromosomes), the egg cell has half the number of chromosomes compared to the skin cell.

### Step 3: Identify the Major Difference
- The major difference between a human skin cell and a human egg cell is the number of chromosomes they contain. The skin cell has twice as many chromosomes as the egg cell.

### Conclusion
- Therefore, the correct statement regarding the major difference is that the egg cell has half as many chromosomes as the skin cell.