What would be the ratio of chromosome number between an egg and its zygote? How is the sperm genetically different from the egg?

Explanation

### Step-by-Step Solution:

1. **Understanding Chromosome Numbers**:
- In humans and many organisms, chromosomes come in pairs. The total number of chromosomes in a somatic (body) cell is called the diploid number (2n), while gametes (sperm and egg) contain half that number, known as the haploid number (n).

2. **Chromosome Number in Egg**:
- The egg (female gamete) contains half the number of chromosomes. For example, in humans, the diploid number is 46, so the haploid number in the egg is 23.

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