Why do Christians bow their head and clasp their hands in prayer?
Is their anything Biblical and if so what is the scripture?
I believe it is tradition. But where did it get its start?

RustyFairmount

I think it's genetic. Watch little children when they're caught in a lie, or embarrassed. They tend to bow their heads. Bowing your head is a sign of submission. You humble yourself in front of someone (or God) who is superior to you.

The key is in the type of prayer being said. If it is a prayer of praise, then raising my head and hands is appropriate. If I am admitting my inferiority, and wish to be like Jesus, I bow my head. Context is extremely important.

De Maria

We bow our head as an expression of humility.

Luke 14 11 Because every one that exalteth himself, shall be humbled; and he that humbleth himself, shall be exalted.

Clasping hands probably began in the early Church when Christians approached the Eucharist, they were instructed to make a "throne" with their hands to recieve the King. This is explained by St Cyril.

Communion may be received either in the hand or on the tongue. Around the year A.D. 390, Cyril of Jerusalem indicated that the early Church practiced Communion in the hand when he instructed his audience: "Approaching, therefore, come not with thy wrists extended, or thy fingers open; but make thy left hand as if a throne for thy right, which is on the eve of receiving the King. And having hallowed thy palm, receive the body of Christ, saying after it, ‘Amen.’ Then after thou hast with carefulness hallowed thine eyes by the touch of the holy body, partake thereof; giving heed lest thou lose any of it; for what thou losest is a loss to thee as it were from one of thine own members. For tell me, if anyone gave thee gold dust, wouldst thou not with all precaution keep it fast, being on thy guard against losing any of it, and suffering loss?" (Catechetical Lectures 23:22).
Who Can Receive Communion?

Sincerely,