Given that network fees are variable... it may not necessarily result in a larger fee if you have 10 inputs making up your 1 BTC, as opposed to 1 input making up your 1 BTC. What WILL happen is that your transaction will be nearly 10 times as large.

10x 148 bytes vs 1x 148 bytes... As fees "should" be calculated on a "satoshis per byte" basis... all other things being equal... a transaction with 10 inputs is likely to need 9 to 10 times the TOTAL fee to achieve the same fee rate (for example, 100 sats/byte = 148,000 sats TOTAL for 1480 bytes, vs 14,800 sats TOTAL for 148 bytes).

Also, NOTE: that the transaction size isn't based on the number of addresses... it is based on the number of INPUTS. 10 addresses with 1 input each... or 1 address with 10 inputs... either way it is still 10 inputs.

It's not like a fiat bank account... you don't put ten separate 0.1 BTC inputs in BitcoinAddressA and you magically have 1x 1 BTC input in BitcoinAddressA... you still end up with 10 separate inputs!