how to insert radi button value in c#.net??

Question

Hi friends

 I m beginner in c#.net. I have two radio buttons namely male and female. I want to insert that field to my table. i dont know how to insert. and also if i select grid row field of column name gender if it is male maleRadioButton should be enabled if it is female FemaleRadiobutton should be enabled.  Any idea.....

<td>
<asp:RadioButton ID="rbMale" runat="server" GroupName="b" Text="Male" />
            &nbsp;&nbsp;
            <asp:RadioButton ID="rbFemale" runat="server" GroupName="b" Text="Female" />

</td>


 <asp:GridView ID="gvNewRegistration" runat="server" AllowPaging="True"
                      AutoGenerateColumns="False" CellPadding="4" DataSourceID="SqlNewRegistration"
                      EmptyDataText="No Records found !!" ForeColor="#333333" GridLines="None"
                      Height="289px" ondatabound="gvNewRegistration_DataBound"
                      onprerender="gvNewRegistration_PreRender"
                      onrowcommand="gvNewRegistration_RowCommand"
                      onselectedindexchanged="gvNewRegistration_SelectedIndexChanged"
                      ShowFooter="True" Width="414px">
                      <RowStyle BackColor="#FFFBD6" ForeColor="#333333" />
                      <Columns>
                          <asp:CommandField ShowSelectButton="true" />
                           <asp:BoundField DataField="Sex" HeaderText="Sex" SortExpression="Sex" />


this is my .aspx page...






  Thanks in advance.........