The property is reportedly bought by your father, hence it is his self acquired property.
He is the absolute owner of the entire property bought by him.
As per law he is the only person who has any right in the property.
Your father has marketable title to the property hence he can very well transact with this property in any manner of his choice and desire.
His decision to transfer the entire property to your brother cannot be challenged or his authority can be questioned.
This property neither comes under HUF nor he is a Karta to the properties.
He is the absolute owner of the property, hence any case filed by you against his decision or seeking any share in the property is not maintainable in law.
Instead of fighting a losing legal battle, you can arrange for a family meeting and place the request to allot you both the sisters a share in the property out of love and affection towards the female children too.