Answer the following questions in the spaces provided.

1. Across a population the ratio of male to female is 50:50. In small families this is usually not the case. Why is
this? Explain your answer.

2. Explain why inheritance of sex always occurs through the male.

3. In a large family of 6 girls and 1 boy what is the chance of the next child being a girl?

4. Explain what happens to the sex chromosomes during meiosis.