Why is my hair a differnet color than my siblings?

  • Thread starter Thread starter pontopanot
  • Start date Start date
P

pontopanot

Guest
Hair color is controlled by more than one gene, but basically, your parents carry two alleles each: it can be 2 dark, 1 light 1 dark, or 2 light. If they have one of each, only the dominant one shows up in their hair, but they still can pass on the other hair color to you and your siblings. The genes are randomly assigned to you, so maybe your sibling got a combination that gave him/her dark hair, while you got a combination that gave you light hair. It's just random chance. Other genes control all the subtle variations in hair that make your hair color unique.
 
Because maybe you got the hair color from one family member and your siblings got it from another family member. I have brown hair and my brother and sister have red hair. It all depends on where you get your genes from.
 
This is just a guess, because you didn't provide enough information, but i'm guessing your parents and siblings all have dark hair. This means they have one of two genetic make ups, Xx (heterogeneous, one dominant and one recessive) or XX (homogeneous, two dominant). For the sake of this question, I'm going to say your parents are both Xx (heterogeneous). When they had your siblings, at least one of them passed on a dominant gene, giving them dark hair (the dominant gene is expressed over recessive and dark hair is dominant). When they had you, they gave you heterogeneous (xx) and you have light hair.

If this isn't the exact case you can figure it out based on the same principles.
 
This is just a guess, because you didn't provide enough information, but i'm guessing your parents and siblings all have dark hair. This means they have one of two genetic make ups, Xx (heterogeneous, one dominant and one recessive) or XX (homogeneous, two dominant). For the sake of this question, I'm going to say your parents are both Xx (heterogeneous). When they had your siblings, at least one of them passed on a dominant gene, giving them dark hair (the dominant gene is expressed over recessive and dark hair is dominant). When they had you, they gave you heterogeneous (xx) and you have light hair.

If this isn't the exact case you can figure it out based on the same principles.
 
This is just a guess, because you didn't provide enough information, but i'm guessing your parents and siblings all have dark hair. This means they have one of two genetic make ups, Xx (heterogeneous, one dominant and one recessive) or XX (homogeneous, two dominant). For the sake of this question, I'm going to say your parents are both Xx (heterogeneous). When they had your siblings, at least one of them passed on a dominant gene, giving them dark hair (the dominant gene is expressed over recessive and dark hair is dominant). When they had you, they gave you heterogeneous (xx) and you have light hair.

If this isn't the exact case you can figure it out based on the same principles.
 
Back
Top