In third pregnancy of a human couple what will be probability of having a son ?

Explanation

To determine the probability of having a son in the third pregnancy of a human couple, we can follow these steps:

### Step 1: Understand the Genetic Makeup
- A human male has the sex chromosomes XY, while a female has XX.
- During reproduction, the male can contribute either an X or a Y chromosome, while the female can only contribute an X chromosome.

### Step 2: Determine the Possible Combinations
- When a male (XY) and female (XX) reproduce, the possible combinations of sex chromosomes in the offspring are:
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