The Earth is about 4.6 billion years old. However, the oldest sea floor is only about 180 million years old. What do you think is the reason for this? (Hint: Remember that new seafloor is constantly being created, but the Earth is not getting bigger with time.)

The seafloor is only 180 million years old due to the process of subduction. The floor of the sea's tends to get colder and denser with the passage of time. At a certain time, the seafloor becomes so dense that it sinks in the upper mantle. The Earth's crust cannot undergo this process and hence has oldest rocks. We can say that the seafloor is less than 180 million years old because it is typically recycled back into the mantle of the Earth.

Answer

The location of a gene found here is at the short arm of chromosome 17 at the specific point of the short arm of 23.6 on the chromosome.

Meaning of the address 12p7.2

12- chromosome 12

p- short arm of chromosome 12

7.2- exact point of the short arm on chromosome 12. The position of the gene on the p or q arm. The position of a gene is based on a distinctive pattern of light and dark bands that appear when the chromosome is stained in a certain way.

These addresses allow scientist and doctors to have a quick and easy way to reference specific genes to where they are which gives insight into their location.