The normal linkage map positions of five 2nd-chromosome loci in drosophilamelanogaster is shown above. a new wild type strain isolated in africa was crossed to a normal strain with genotype pr vg lo px sk / pr vg lo px sk and the resulting f1 backcrossed to the normal recessive parent. the progeny was analyzed and the

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds

they have identical fossils of organisms that have evolved over time.

both have animal fossils preserved in them due to weathering and erosion.

they contain different fossils because life on earth has changed through time.

the fossils in them were formed on the surface of earth due to exposure to sunlight.