> How likely is it for two sperm to be [at least] 78% identical? According to the paper: > "Our results show that the twins share 78% of their paternal genome

> How likely is it for two sperm to be [at least] 78% identical? According to the paper: > "Our results show that the twins share 78% of their paternal genome, which is 1.5 SD above the expected 50% allele sharing of independent paternal genomes." 1.5 SD and above corresponds to a 6.7% chance likelihood, or 1 in 15.