F (coefficient of inbreeding): F is the symbol for the coefficient of inbreeding, a way of gauging how close two people are genetically to one another. The coefficient of inbreeding, F, is the probability that a person with two identical genes received both genes from one ancestor.
Take, for example, the mating of first cousins who, by definition, share a set of grandparents. For any particular gene in the male, the chance that his female first cousin inherited the same gene from the same source is 1/8. Further, for any gene the man passes to his child, the chance is 1/8 that the woman has the same gene and ½ that she transmits that gene to the child so 1/8 X ½ = 1/16. Thus, a first-cousin marriage has a coefficient of inbreeding F =1/16.
The added risks for the offspring of first cousins depend not only upon the coefficient of inbreeding but also upon the genetic family history and test results. For example, first cousins of Italian descent are at increased risk of carrying a gene for beta thalassemia and genetic laboratory tests may confirm that they are both beta-thalassemia gene carriers.
There are always added risks in the mating of closely related persons and those risks are not entirely negligible.
F (coefficient of inbreeding): F is the symbol for the coefficient of inbreeding, a way of gauging how close two people are genetically to one another.
The simplest method to compute the Coefficient Of Inbreeding ("COI" or "F") is the path method. It consists in determining each of the possible paths from the father to ...
THE COEFFICIENT OF INBREEDING (F) AND ITS APPLICATIONS. F measures the probability that two genes at any locus in an individual are identical by descent from the common ...
Software for rapid computation of inbreeding coefficients for a population.
To account for this we have to multiply the inbreeding coefficient calculated for Fred by (1 + F A), where F A is the inbreeding coefficient calculated for Anson.