Why am I the only one in my family with blonde hair?

[Khakicrocs]

My parents and brother are all dark haired. I have blonde hair and blue eyes. My dad does have blue eyes, but my mum and brother have brown. But their hair is all totally different to mine.
I used to think I was adopted when growing up. My son now has white blonde hair so it’s obviously a strong gene from me (my partner has brown hair).

Blonde is a recessive gene. It hides and crops up I believe (I'm the same btw, and I am definitely not adopted) it's come out again in your boy.

Recessive gene.

My parents both have mousy brown hair, my sister is ginger and I'm blonde.

Apparently both parents had aunts with auburn hair and my GD had blonde hair as a young man.

You’re special 💕

You beat me to it! Tow-headed milkman.

My parents both have mousy brown hair, my sister is ginger and I'm blonde

Same here. My sibling started off with blonde hair which turned ginger in teen years. I am blonde. Parents have brown hair.

My parents, my brother and I, and my husband all have dark hair. My 2 children have lighter brown hair, and my daughter has streaks of blonde through hers. There is no blonde in my immediate family but my cousins have blonde hair, so it can be passed through somehow.

You have two genes for hair colour, one from your Mum and one from your Dad, Your parents must have one dark gene and one light gene each, they are expressing the dark genes but have each passed a blonde gene to you, so you are blonde.
You have two blonde genes, your partner has a blonde gene and a dark gene, he is expressing the dark gene, so he is dark. He has passed his unexpressed recessive blonde gene onto your son, who had two blonde genes, one from you and one from his Dad and so is blonde. If you have another child that child may get a blonde gene from you and a blonde gene from his Dad and be blonde or he/ she may get a blonde gene from you and a dark gene from his Dad and be dark. The dark gene effectively overwrites the blonde gene.
That’s the general gist anyway.

I had blonde hair growing up and it gradually got darker. I always had highlights as I’ve always been blonde, but didn’t during covid and decided to let my natural colour grow out. It’s actually really dark and darker now compared to my friends who were never blonde and always mousey brown.

It’s strange how hair changes colour. I know lots of blondes but hardly any who are naturally that colour as adults. What some people would class as blonde, someone else would class as light brown…

I know it's a lot more complicated than this but my mum explained it years ago to me as your dad and mum each passed down a blonde hair gene to you which they got from one of their parents. But they inherited a brown one too from their other parent which is dominant so expressed in them and in your siblings who got one or two browns from them. It came though in your son because the one your partner passed on to him didn't override the blonde one from you (so he didn't pass on his dominant brown gene but a blonde one he inherited but which wasn't expressed in him)

Genetics are always so interesting. I have dark brown hair and brown eyes, my husband has black hair and blue eyes, our son has very light brown hair and grey or hazel eyes (still haven’t worked it out). He doesn’t have the same hair or eye colour as anyone in the last three generations of my family! There must be recessive genes from somewhere far back cropping up in him. I’m pregnant and very interested to see what the next baby looks like.

Genes are weird. All my siblings and my parents have dark blonde/mousey hair. My other half has black hair although his family’s are either brown or blonde. Our daughter has dark blonde hair, and our son has red hair. Can assure you they’re both his!

You're blonde for the same reason I was the only redhead in my family for about 30 years

Recessive genes hide behind the dominant and only come out to play when dad's recessive meets mum's recessive

Dad =brown hair
Mum=black hair
2 x brothers = brown hair
Me = red hair

They had a 1:4 chance of getting me

You and I beat the odds!

I'm the same, fair skinned, blonde and green eyes, the rest of my siblings are dark olive skin, brown/hazel eyes, my aunts are also dark except one and then my grandmother was the fairer one in her family, then her father the same.... there's one lighter family member per generation it seems.
Just one of those old recessive treats!

Me and DH have brown hair, all 4 of our parents have brown hair. Out of our 2 DD’s, one is brown, one is ginger.

The ginger gene has snuck through from my Grandmother (DD’s great-grandmother) who was also ginger but it hadn’t presented in the next 2 genrerations before popping up in dd. Dh can’t remember a ginger relative on his side but there will have been one somewhere for him to pass the gene on.

There’s one redhead in every generation of my family going back absolutely ages. I only actually know my great uncle, my uncle, my sister and my nephew but I’m pretty sure they can’t all be the milkman’s.

Genes can hide and reappear long down the line.

As others have said, it's just a recessive gene thing.

My niece is one of seven kids. She has very dark hair but all six of her siblings are blonde.

My son is a red head all his siblings are dark, I have 2 brown eyed 2 blue one ginger I’m dark his dad is dark etc just happens not sure how it’s odd or mysterious

Same as why my lad is ginger and no one in my family is.
In Dh immediate family and first cousins there's no gingers. However going back to the great uncles there's loads of them.
Dh's aunty showed me a picture of her dad taken around 1920 when he was about 20, the same age as ds. The two looked like twins. About half an hour later a very distant relative walked into the family reunion and he looked near enough the same as Ds and the uncle ( This relative was 23)

I honstly never expected a ginger with everyone else being blonde or fair on both sides of the immediate family ( and further back with mine)

Blonde hair is a recessive gene. I somehow have 2 blonde haired children even though both DH and I have dark hair. There is blonde in both our families so it's not that unlikely. It means both DH and I carry the gene for blonde hair, but as it's recessive the dark hair gene won out for us, but as we both passed our blonde hair gene to the children that's what we got.

I was the only blonde growing up in my family too! My dad had black hair and my mum had brown hair. The mystery was solved when I turned my 13… I learnt my dad wasn’t my biological father…

My DD has blue eyes. Her parents - 1 has green, 1 has brown. Both her grandmothers have blue eyes so assume it's from them.

Another rogue redhead here! None on either side in living memory, but a whole load of dark haired, brown ancestors on my mum's side have obviously had the gene lurking.