What is formed when reverse transcriptase is used on a strand of mRNA

In fruit flies, gray bodies (g) are dominant over black bodies (g), and brown pigments (n) are dominant over yellow pigments (n). each individual possesses two alleles for each trait. if a fly that is homozygous dominant for both traits is crossed with a fly that is homozygous recessive for both traits, what is the predicted genotype of the offspring.

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

This is a scaffolding of protein fibers that us sell keep it shape in a cell division and cell movement