Afemale drosophila with the mutant phenotype a is crossed to a male who has the mutant phenotype b. in the resulting f1 generation all females are wild-type and all males have the a mutant phenotype. based on these results, we can conclude that the mode of inheritance of the phenotype of interest is:

a) autosomal for a and x-linked for b
b) dominant for a and recessive for b
c) recessive for a and dominant for b
d) recessive for both a and b
e) x-linked for a and autosomal for b

The correct answer is option D.

Explanation:

This is an illustration of X-linked recessive inheritance. This is a result of the mutation of genes on X-chromosomes. As females carry two X chromosomes, one from each parent, there is less chance for a female to carry mutant copies on both the X-chromosomes.  

As males possess only one X-chromosomes, obtained from the female parent, one changed gene is adequate to result in a mutant phenotype. All the males exhibit a mutant phenotype as the male parent cannot transfer the X-linked traits to the progeny.  

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

genetic variation will increase because of a new habitat and food source.

explanation: