When It Comes To Eyecolor How Common Is This ?

Question

I have 2 brothers and one sister, yet I am the only one with brown eyes. My 2 brothers have blue eyes while my sister has hazel eyes. I am the only one who shares the same brown eyecolor as my mother. My father has blue eyes. I thought brown was a dominant eyecolor when one has a brown eyed parent and a light eyed parent, so why am I the only one that came out with brown eyes ?

Answer 1

Eye color is not determined by one pair of genes, there are at least 3 pairs of genes that effect eye color.  Since more than one gene pair is involved one can not assume the 3 to 1 ration of a single pair, but rather a more complexed relationship between the genes, this multigene effect is what gives your sister her hazel eyes.

Answer 2

This all has to do with genetics. Perhaps in your family, a few generations back, like your grandparents, or they're parents had blues eyes. This could influence the chance of blue eyes being dominant in later generations.

You also have to remember that while the dominant/recessive approach works, its not always correct. You have to allow for genetic modification. Take my family for example:

My mum has green/Grey eyes, while my dad has dark brown. I have five other siblings, and only my brother has brown eyes. Three of us have mum's green/Grey, while my other two sisters have blue.

It's really all just chance.

Answer 3

You father is homozygous for blue eyes, and your mother is heterozygous for brown eyes. Theoretically there is 50-50 chance for brown eyes or blue eyes.

Answer 4

Actually, blue is dominant to hazel, so I am guessing your mother is heterozygous brown and hazel, and your father is heterozygous blue and hazel.

Your brothers got blue and hazel like your dad, your sis got two hazels, and you got a brown and either a blue or a hazel.

The chances are as follows:

brown = brown and blue or brown and hazel = 50%

blue = blue and hazel 25%

hazel = hazel and hazel = 25%

There was an equal chance that you would either have brown eyes or NOT have brown eyes, so it's not that uncommon that your siblings have light eyes. It's like a flip of the coin.

Answer 5

this is just how

your dna turned

out

but that probley lets you stand

out

Answer 6

Your mom, even though she has brown eyes, carries the gene for blue eyes.  Apparantely, your two brothers got her blue eye gene and one of your dad's blue eye genes.  You could have either 2 brown eye genes (in which case your children will all have brown eyes) or you might have one brown eye gene and one blue eye gene.  Then, your kids could have either blue or brown eyes, depending on your mate's genetic code.  Brown is the dominate gene.

Answer 7

its just how u are

Answer 8

accident happens :D