If the mother has dark brown eyes and her mother has green eyes and her father has brown eyes and the father has grey eyes and his mother has blue eyes and his father has brown what about there baby?

Answer 1

In short, probably brown. However... "Eye color is a complex trait that depends on the state of several interacting genes. The gene that usually decides the issue (blue eyes or brown eyes) is the OCA2 gene on chromosome 15. But it comes in different strengths. A person with a weak form of the OCA2 gene will have blue eyes. Likewise a person with a strong form will have brown eyes. The plot thickens, though, because an individual also has other eye-color genes that each has a say in the final eye-color outcome. For example, if one of these lesser genes is strong, it can make the weak form (blue) of OCA2 work much more effectively - almost like the strong form (brown). Then the eye color may be a light brown or muddy grey. In fact, the resulting color can be any shade of brown, hazel/green, or blue depending on the strengths of the interactions." quoting: http://www.usatoday.com/tech/columnist/aprilholladay/2004-10-14-wonderquest_x.htm This throws the BB bb argument out the window. While, yes, it is more likely that the child will have brown eyes, it is far from guaranteed. It is even possible for two blue eyed people, or one blue and one green, to have brown eyed babies. There is no real way of knowing exactly what will happen until the baby is born.

Answer 2

The inheritance of eye color is complicated and involves more than one gene. Each child has a 75% probablility of brown eyes and a 18.75% probability of green eyes and a 6.25% probablity of blue eyes. On average, about three quarters of the children of this cross will have brown eyes, three sixteenths green eyes, and one sixteenth blue eyes.

Answer 3

Unless you know which set of alleles your parents passed onto you and which ones your spouse's parents passed on to him/her, this will be difficult to tell.

However, if we confine ourselves strictly to mother and father, brown eyes are dominant over grey eyes. In many cases then, we can conclude, the baby would have brown eyes.

But also it should be taken into consideration that eye color doesn't work the same way as other traits, such as "dimples or no dimples" or "widow's peak or no widow's peak." It pretty much goes to say that with phenotype (physical appearance), traits can be mixed, displaying more or less of one or the other parent. Perhaps the eyes might be blue, even, one or both of the parents' parents had blue eyes. Colors in eyes can be mixed, and can be more than one color (hazel and green make chesnut eyes, blue and green eyes are common, and grey and blue eyes, etc.), or they can be many different shades or completely unique (the common example is Elizabeth Taylor, with her famous violet eyes).

In addition to this, when the haploid sex cells combine there are technically four distinct possibilities for each trait. And since we can't know which of the four possible "outcomes" this baby will be for this particular trait, it's really very hard to tell.

Answer 4

yes, if the maternal grandfathers eyes sre blue then the blue eye color gene is passed down from the maternal grandfather through the parents to the child

Answer 5

brown

Answer 6

Hazel eyes.