In: Biology
White eye is a recessive X-linked mutant in fruit flies. A wild type male is mated to a white-eyed female. What is the probability that an F1 son will be white eyed?
A. 0
B. 0.25
C. 0.5
D. 0.75
E. 1.0
Answer
X linked white eye recessive mutant will express when there is both the X chromosome contains white eye mutation allele.
In male there is two chromosomes X and Y.
So in male if X chromosome have white eye allele then all male or son are white eyed male.
X linked recessive mutation is seen in homozygous female having both chromosome contain mutatnt allele.while in male if only one x chromosomae have mutatnt allele then male is seen to be mutant phenotype.
The correct answer is option (E) probability is 1 to be all sons are white eyed.