Genetic problem:

A brown-eyed woman whose father was brown-eyed and whose mother was blue-eyed married a blue-eyed man whose father and mother were both brown-eyed. The couple has a blue-eyed son. For which of the individuals mentioned can you be sure of genotypes? What are their genotypes? What genotypes are possible for the others?

http://museum.thetech.org/ugenetics/eyeCalc/eyecalculator.html

i am in a confusion my self dear.............

To determine the genotypes of the individuals mentioned, we can use the principles of inheritance and Punnett squares.

First, let's assign some letters to represent the eye color genes. Let's use "B" for brown eye color allele, and "b" for blue eye color allele. Since brown eye color is dominant over blue eye color, individuals can have either two brown eye color alleles (BB), or one brown and one blue eye color allele (Bb), which leads to brown eye color phenotype.

Based on the information given, let's analyze each individual:

1. Brown-eyed woman (individual A):
- Her father had brown eyes, so his genotype must be BB.
- Her mother had blue eyes, so her genotype must be bb.
- The woman herself has brown eyes, which means she inherited one brown allele (B) from her father and one blue allele (b) from her mother.
- Therefore, her genotype would be Bb.

2. Blue-eyed man (individual B):
- His father and mother both had brown eyes.
- Since brown eye color is dominant, both of his parents must have had at least one brown eye color allele.
- However, we don't know if they were homozygous (BB) or heterozygous (Bb) for brown eye color.
- Let's assume one parent was heterozygous (Bb) and the other homozygous (BB), for illustrative purposes.
- This means there are two potential genotypes for individual B's parents: Bb and BB.
- If one parent is Bb and the other is BB, individual B's genotype could be either Bb or BB.

3. Blue-eyed son (individual C):
- Both of his parents have at least one blue eye color allele (bb).
- Since blue eye color is recessive, the son must have two copies of the blue eye color allele (bb).
- Therefore, his genotype would be bb.

In summary:
- The genotype of the brown-eyed woman (individual A) is Bb.
- The genotype of the blue-eyed son (individual C) is bb.
- The genotype of the blue-eyed man (individual B) could be either Bb or BB, depending on the genotypes of his parents.

Keep in mind that there are different possibilities for the genotypes of individual B's parents, so without further information, we cannot be certain of their specific genotypes. The given information only allows us to determine the genotypes of the brown-eyed woman (individual A) and the blue-eyed son (individual C).