In fruit flies (drosophila melanogaster) there is a dominant allele for red eyes and a recessive allele for white eyes. these alleles are located on the x chromosome. if a heterozygous red-eyed female is mated with a white-eyed male, what percentage of the offspring are expected to be white-eyed females?

50% of the offspring female population are expected to be white eyed females

Explanation:

Since the allele can only be found on the X chromosome, the chances of the offspring developing white eyes, would mostly occur in the females; since the heterozygous female would mate with a white eyed male.

This results to the following below

R- red eyes

w- white eyes

Female - R w            X             Male- w w

Offspring alleles F1-   R w   R w   w w   w w

Therefore, from the cross, we can conclude that the percentage possibility of white eyed females is... 50%.

Explanation:

50% of the offspring female population are expected to be white eyed females

the correct option is option d

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.