Eliza, ... you have some 'splainin' to do!
Blue-eyed Jess (Coop) and blue-eyed Eliza (Dorothy McGuire) would not have produced brown-eyed Josh (Anthony Perkins).
shareBio 101, a grandparent with brown eyes can result in a brown eyed grandchild from both blue eyed parents. Blue eyes are a genetically recessive trait.
shareDon't think so. Jess and Eliza wouldn't have had the dominant genes to pass on, because they were both the product of recessive genes from both of their parents.
Check out: http://www.athro.com/evo/gen/eyecols.html
(sorry, I haven't mastered the clickability markup)
I think I'm right, any way blue eyes are always recessive, since we don't know their parents eye color, we can only assume one had brown eyes, however back in the late 19th century like 58% of all American Caucasians were born with blue eyes, compared to 40% in the 1940's, so I would assume or extrapolate that the percentage was even higher in the early 1800's, and it's more likely Jess and Eliza's parents were both blue eyed.
shareOnce again:
Even if Eliza or Jess had a parent with brown eyes, each of their parents only passed on the recessive genes for blue eyes. Therefore, Jess and Eliza only had recessive genes for blue eyes to pass on to their children.
Just for discussion:
Jess's parents:
Mother had brown eyes (1 brown gene dominating 1 blue gene)
Father had blue dyes (2 recessive blue genes)
Mother happened to pass on the recessive blue gene to combine with a blue gene from Father.
Jess has blue eyes, which comes from having two recessive genes.
Jess only has recessive genes to pass on to his children
Eliza's parents both had brown eyes (1 brown gene dominating 1 blue gene)
It so happens that each of them passes on the recessive blue gene.
Eliza has blue eyes, because she has been given two recessive genes for blue.
Eliza only has the recessive genes to pass on to her children.
Their children receive only recessive genes for eye color, if Jess is, in fact, the father.
Brown-eyed parents can have blue-eyed children.
Blue-eyed parents will not have brown-eyed children.
Sorry I mentioned it.
Don't be sorry, it's an interesting discussion.
shareHaha..I love this discussion a lot.Well,Tony Perkins did not look much like his real daddy Osgood Perkins although he also had brown eyes and dark hair.However,Osgood had a very marky,not too beautiful face whereas Tony looked tender and very pretty.It is always interesting how genes can vary :)
Best wishes,
Mony
[deleted]
Read carefully:
We're talking about blue-eyed parents.
Your parents have brown eyes. We've explained it above.
Two blue-eyed parents can have a child with brown eyes.
Most of us learned the model for determining eye color that G.C. Davenport and C.B. Davenport devised in 1907. The Davenport model wrongly says brown eye color is always dominant over blue eye color, which means that two blue-eyed parents always have blue-eyed kids. We know better now.
"Although not common, two blue-eyed parents can produce children with brown eyes," says Richard A. Sturm, a Principal Research Fellow at the Institute for Molecular Bioscience at the University of Queensland in Brisbane, Australia.
http://www.usatoday.com/tech/columnist/aprilholladay/2004-10-14-wonder quest_x.htm
Both my grandparents had blue eyes, had four children, 3 with blue eyes, one with brown eyes, and grandma did not sleep with the milk man!
i sort of stumbled onto this conversation but i have my story so here goes:
both my parents and my sister have hazel eyes.....i am the only one in my family with brown eyes....and i look just like my father...no mailman here...
Around the time I was born (before color TV, OK?), a study was published claiming that blue-eyed parents could not have a brown-eyed child. Some irate mothers checked in, and, after the dust settled, it was determined that brown-eyed babies of blue-eyed parents were a 1 in 1,000,000 genetic mutation.
So if you didn't feel like a weirdo before...
My grandparents had both brown eyes and had 3 kids with green/blue eyes and 12 with brown and hazel eyes. My blue-eyed aunt, had two redheaded grandchildren, and they said it was because of my aunt grandparents. Is it common for the genes to predominate every three or four generations?
share