"b" indicates an "x" chromosome carrying the recessive
the father is ... xY , and the mother is ... xX
the Punnett square gives ... xx , xY , Xx , XY ... all with equal probability
xx - color blind female
xY - color blind male
Xx - female "carrier" - has gene, but not expressed - normal X dominates
XY - normal male
Colorblindness is inherited as a sex-linked recessive disease. Let’s say an
affected male marries a heterozygous female. What is the chance that they will have an affected child? Could any of their daughters be affected? Please use the letter “b” to indicate an affected chromosome.
With a Punnett square, it shows that there is a 50/50 change that a child would be affected but I got confused when the question asks about the daughter specifically. Anything helps!
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1 answer