In a developing fetus, what influences whether it is going to become male or female? What influences the cells to start building male or female organs?

Question

In a developing fetus, what influences whether it is going to become male or female? What influences the cells to start building male or female organs?

In: 274

Answer 1

It’s predetermined by the chromosomes in the sperm cell.

The egg cell is always X. The sperm cell will be either X or Y.
When combined, the cells become either XX (female) or XY (male) and thus the cells continue to grow into a male or female human.

Two halves to make a whole 🙂