5) The alleles of a gene are found at chromosomes. A) the same locus on nonhomologousB) different loci on homologousC) different loci on nonhomologousD) the same locus on homologous

option D

Explanation:

The alleles of a gene can be described as the variant form of a gene. for example A and a are two alleles coding for the trait tallness. these forms are located at the same position ie locus on a chromosome. thus they are located on the same position for two similar chromosomes (homologous chromosomes).

1. the geologists have established a set of principals that can can be used o determine the relative ages of rock. this principal is applied to sedimentary and volcanic rocks. the rocks exposed to wall of grand canyon has layers and by studying the number of horizontal layers in the rock(strata) the relative age can be determined. the layer first formed will appear at the bottom and the the layer of strata last formed appear at the top. by using this information the approximate age of rocks can be determined.

2. carbon dating is used to find the relative age of rock in numbers which means for the rocks that has age between 1-70,000 years.

3. for the rocks of age range between 1,000 - billion of years potassium-argon dating is used.