How many pairs of chromosomes are present in human beings ? Out of these how many are sex chromosomes ? How many types of sex chromosomes are found in human beings ? "The sex of a new born child is a matter of chance and none of the parents may be newborn to justify this statement.

Explanation

### Step-by-Step Solution:

1. **Determine the Total Number of Chromosome Pairs in Humans**:
- Humans have a total of **23 pairs of chromosomes**. This means there are 46 chromosomes in total (23 from the mother and 23 from the father).

2. **Identify the Number of Sex Chromosome Pairs**:
- Out of the 23 pairs, **1 pair** is designated as sex chromosomes. This pair determines the sex of the individual.

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