In animals, a rare disease called albinism results in the absence of pigment in cells. This leads to a specific phenotype where the organism lacks fur or skin colour. In humans the allele for albinism is recessive and linked to the X-chromosome (Xa). An albino male and a female heterozygous for this allele are getting children.
Determine the chance that their first born is an albino girl.
( 6 steps!)
Lesson duration is: 45 min
