(i) Yes, the genotypes of the parents must be: Female: w+w+; Male: w+cut.
(ii) No.
(iii) Yes, the genotypes of the parents must be: Female: w+w+; Male: w+Xcut.
(iv) No.
16. You are studying a species of fruit fly, Drosophila mitensis, and you find a fly that has cut wings as seen here (use “w+” as wild type allele and “cut” as cut wings allele):
(a) Female fruit flies with normal wings were crossed to males with malformed "cut" wings. The F1 progeny were:
1/4 normal females
1/4 cut-wing females
1/4 normal males
1/4 cut-wing males
State if each of the following modes of inheritance can explain these results (1 mark each), and if so, what the genotypes of the parents must be (2 marks each). Use Punnett squares to determine the outcomes. (12 marks)
(i) Cut wing is autosomal recessive ________
(ii) Cut wing is autosomal dominant ________
(iii) Cut wing is X-linked recessive _________
(iv) Cut wing is X-linked dominant _________
1 answer