Question

What type of inheritance pattern is shown by bar-eyed trait?

• A. Autosomal dominant
• B. Autosomal recessive
• C. Sex linked dominant
• D. Sex linked recessive
• E. Cannot be determined by the information given

Answer 1

The correct option is C Sex linked dominant

Cross 2 between wild-type female and bar-eyed male follow the criss-cross inheritance and gives wild-type males and bar-eyed females. This indicates that the trait is not autosomal but is X-linked. The trait is dominant as cross 1 between bar-eyed female and wild type male gives bar-eyed females. If the trait was recessive, both parents should have at least one copy of bar eye allele to have bar eyed female progeny. Thus, the correct answer is C.