In People Setup and in Define Lists, you can map Record Types to Member Statuses. This lets you select a Member Status and then ACS automatically fills in the Record Type. For example, if you map the Member Status of Child of Member to the Record Type of Other, when you select Child of Member as Member Status, the Record Type automatically changes from blank to Other.
In ACS, each individual must have a Record Type for high-level sorting. Member Status and Record Type are similar and often misunderstood. Some examples of member statuses are resident member, non resident member, prospect, and contributor only.