Question

Read the passage and answer the following question.
An experiment is carried out to explore inheritance of the bar-eyed trait in fruit flies. Homozygous bar-eyed and wild-type flies are mated, producing two $F_1$ generations. Then crossing of $F_1$ offsprings produces two $F_2$ generations.
Here are the data from those 4 crosses which records one hundred offspring from each cross.
Which of the following is the the pattern of inheritance for bar-eyed?

• 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

In the given experiment, the cross between a homozygous bar-eyed and wild type flies 51 bar-eyed males, and 47 bar -eyed females. further, in the cross of F1 generation gives rise to 22 bar -eyed males, 51 bar eyed females, 27 wild type males, and 0 wild type females. This shows that the bar-eyed trait in fruit flies is a sex-linked dominant trait