U cant inherit the major foundational gene for male pattern baldness from the paternal side because the father only contributes a Y to make u XY (male) ..The MBP gene reside on the X which is inherited from the maternal side of the family with an history of MBP who contrributed XX to yr mum. One of the X ( yr maternal grandfather or yr mum ) came to u. So its all to do with yr mother side of family, if u have bald maternal grandfathers like yr mum's father or her own maternal uncles or brothers , u likely to bald as well . The word here is likely.. but there is a chance 50-50 chance u will not., depending on which X u inherited from yr mum;s side.
Remember females have been carrying the Baldness gene on one of their Xs all along but it did not manifest itself on them or their daughters but rather on their sons and brothers, Since yr mum is XX ( 2 Xs) its either of the 2 below:
U inherited:
The X of yr mum inherited from her own mum ( yr maternal grandmum) who has the baldness on X
the X of yr mum's father ( yr maternal grandfather) who has baldness on X
In my case
my maternal grandmum has brothers who are bald. But her husband ( my maternal grandfather is not bald)
My mum could have inherited the baldness X from her own mum, or her father ( my maternal grndfather)
She passed it on to me as X ( with baldness) + Y ( my father) = I am XY. As u can see why my father has nothign to do with baldness beacuse he did not contribute an X.
But looking at myself i am not bald . only expereincing a very slow thinning male pattern baldness . the temples have resided but not as bad.. it follows almost the same pattern as my maternal grandfather ( my mum's fatther) who at old age of 60s passed away with some hair but not totally bald. just a NW1-2 .
So its most likely i got my baldness X from my maternal grandfather...if i were to inherit the baldness X from my grandmum who has bald brothers, i would have been totally bald by now ( my age 42) because they , my grandmum's brothers were bald at 40 years of age
The key here is to look at these people especially their younger and current family photographs to study their hair loss pattern:
Yr maternal grandmum's brothers
Yr mum's father
Yr mum's brothers
T0 find out who u inherited the problem from.
For my own example:
my maternal grandmum's brothers ( bald after 40 )
my mum's father ( not bald/ NW1-2)
my mum's brothers ( not bald/ thinning hair after 50 )
I have the same pattern as my maternal gradnfather
So its likely that i have inherited the baldness X from my grandfather since my
my mum's father ( not bald/ NW1-2)
my mum's brothers ( not bald/ 1 of them thinning hair after 50 )