Can you add MAFs together for a gene and calculate the number of recessive individuals?

Hello!

Which is correct when considering minor allele freq (MAF) for a given gene?

1) Add all MAFs together and square result. Multiply times population to get total number of homozygous recessive individuals in a population; or
2) Square each MAF and multiply by population to get homozygous recessive individuals. Add all homozygous recessive individuals to get total number of homozygous recessive individuals?

Please let me know if I need to clarify anything.

Thanks so much!

Michelle