Distinguish from the human pedigree below whether the trait (solid color) could
ID: 79904 • Letter: D
Question
Distinguish from the human pedigree below whether the trait (solid color) could be due to (a) dominant X-linked trait, (b) a Recessive X-linked trait (c) autosomal dominant trait. (d) a sex limited trait. Please answer yes or no for each question (a) Yes or No (b) Yes or No (c) Yes or No (d) Yes or No In drosophila white eyes is recessive and X-lined. A white eyed female is mated to a normal eyed male. Give the proper genotypes and phenotype of the results in the F_1 from the above cross. The two F_1 flies were crossed to produce an F_1. Please give the phenotypes and genotypes of the F_2. Also give the sex of the files and rations in the F_1 and F_2. Show your work to get credit!!!Explanation / Answer
Obj.56.
The answer is A. Dominant X linked trait or C. Autosomal dominant trait.
Because, if it is the sex limited trait it has to express in only on gender, but here the trait expressed in both genders so option D is wrong.
If it is recessieve X linked trait, the sons of affected female should express the trait,but it is not shown in this prdigree. Hence the option B is also wrong.
As it is showing the probabilites of autosomal as well as X linked dominant traits, the inhertinace pattern may be A or C.