I think the correct answer from the choices listed above is option A. When crossing-over takes place, chromosomes exchange corresponding segments of DNA. Corresponding genes on non-sister chromatids are exchanged at chiasmata. Hope this answers the question.
Mercury is a barren planet with little atmosphere. In many regards it is similar to our own moon. However, it is also very close to the Sun, so humans will have to set up bases in craters or near the Poles to avoid being blinded.
<span>Energy in organisms is called homeostasis.</span>
Protons and neutrons. The other guy is annoying I dislike people like him who answer questions and don’t even know it
Answer:
It's d crossing over is the answer
