Answer:
D
Explanation:
Igneous rock is found in magma chambers most commonly
The offsprings or children would be very similar to their parents.
Cross over involves the exchange of chromosomes segments between non-sister chromatids during the process of meiosis. It creates new combinations of genes in the gametes that are not found in either parent, a factor that brings about genetic variation or genetic diversity among individuals. Therefore, without crossover offsprings would be genetic similar with their parents.
Gel electrophoresis separates DNA fragments according to size<span>. Samples containing a mixture of DNA molecules of different sizes are loaded on to the gel. When an electric current is applied DNA moves towards the positive electrode since DNA is negatively charged.</span>