How Many Days After Fertilization Does the Zygote Become a Ball

Question

How many days after fertilization does the zygote become a ball of cells?
A) five days
B) four days
C) one to two days
D) six to eight days
E) it depends on the age of the mother

Accepted Answer

The zygote undergoes cleavage, dividing into two cells, then four cells, and so on, until it becomes a ball of cells called a morula. This process takes about one to two days.