What evidence? How can you identify the expansion of PIE with this Y-haplotype replacement? I'm genuinely curious. Like I said, my amature interest in more i

What evidence? How can you identify the expansion of PIE with this Y-haplotype replacement? I'm genuinely curious. Like I said, my amature interest in more in PIE from the perspective of historical linguistics but I'd love to know of any evidence linking the expansion of PIE with archeology or genetics.