Regarding eye colour and genetic

Watch
hollywood1
Badges: 0
Rep:
?
#1
Report Thread starter 6 years ago
#1
I wanted to ask if two people have a child and both parents have only brown eyes and no blue eyes in their family history, is it possible their child could have blue eyes? The gene must be recessive, so is it possible the gene has been passed down from antcestors? I know it's not likely, but is it possible?
0
reply
Toriar
Badges: 14
Rep:
?
#2
Report 6 years ago
#2
Yes it is possible
0
reply
PinkMobilePhone
Badges: 22
Rep:
?
#3
Report 6 years ago
#3
As said above, yep it's possible.

From my basic remembering of high-school science :

B is dominant
b is recessive

BB = brown eyes
Bb = brown eyes
bb = blue eyes

So it's entirely possible for everybody in a family to have Bb type brown eyes if one parent has passed down their B and the other parent has passed down their b...

until one day both parents might pass down their b and them bam suddenly a blue eyed child is born.

I know that's basic but that's how they explained it when I was a kid.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

How would you feel if uni students needed to be double vaccinated to start in Autumn?

I'd feel reassured about my own health (33)
14.8%
I'd feel reassured my learning may be less disrupted by isolations/lockdowns (68)
30.49%
I'd feel less anxious about being around large groups (27)
12.11%
I don't mind if others are vaccinated or not (19)
8.52%
I'm concerned it may disadvantage some students (13)
5.83%
I think it's an unfair expectation (60)
26.91%
Something else (tell us in the thread) (3)
1.35%

Watched Threads

View All