Why don’t women get the paternal haplogroup in the results?
To obtain the paternal haplogroup, the genetic information of the sex chromosome Y is analysed.
This chromosome is responsible for male sex determination during embryo formation by activation of the SRY gene. Therefore, only male individuals at birth have this chromosome as their X and Y sex chromosomes, while female individuals at birth have two X sex chromosomes.
However, females at birth can also know this through a study of the DNA of a male member of their family (brother, father, grandfather…), who have the Y chromosome, and share the same paternal haplogroup ancestor. Sons do not serve because they carry the father’s Y chromosome, so their paternal haplogroup comes from the male parent.