why is number 20 also considered autosomal recessive since Males are being affec

Question

why is number 20 also considered autosomal recessive since Males are being affected at a higher rate

20-22 The pedigree shows the inheritance of a birth defect in three generations of a family 2 7 8 910 20. Based on the pedigree, the mode of inheritance of this disease could be A. Autosomal recessive B. X-linked recessive C. Autosomal dominant D. X-linked dominant E. A or B 21. Assume that #7 was an affected female, instead of an affected male as shown. Given that ass then the mode of inheritance of this disease is most likely A. Autosomal recessive B. X-linked recessive C. Autosomal dominant

Explanation / Answer

as 1 is a disease and 2 is unaffected ,so their daughters 4 and 5 are unaffected but they are carrier,when they married to 3 and 6 who are unaffected ,but their children have 50% possibility to get affected.so that reason 7 and 10 are affected.so this is autosomal recessive

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