(1) Haemochromatosis is a mild autosomal recessive condition.Approximately 1 in 200 Australians have the condition, andapproximately 1 in 7 Australians are carriers. Jane is planning onstarting a family, and does not have haemochromatosis, though hermother is affected with the condition. Her father is not affected,and is not a carrier. Jane’s partner Steve does not have thecondition either, but his father is a carrier (his mother is not acarrier).
(a) What are the chances their first child will be affected withhaemochromatosis? (hint: draw a family pedigree)
(b)Unfortunately, things don't work out with Steve. Jane is nowplanning to have a child with Fred, who is not affected withhaemochromatosis. Fred was adopted and knows nothing about hisbiological family, except that they are Australian. What are thechances that Jane and Fred’s first child will be affected withhaemochromatosis?
