I believe its 75% or 50% definetly use a punnet square to check tho!
Answer:
b I think thats the one idk
Eukaryote domain and animal kingdom
Homologous chromosomes pair up and exchange segments of DNA.
Option A
<h3><u>Explanation:</u></h3>
Crossing over is an event of Prophase 1 of meiosis 1. It occurs in the zygotene phase of prophase 1. Here the homologous chromosome pairs get very close together and gets packed within protein coat. The enzymes randomly cut the DNA segments from both chromosomes at same loci and exchange them with each other. This results in the exchange of genes between the two chromosomes. This is how the variation comes to place between offsprings of the same individuals. The crossing over results to form X shaped intersections between homologous pair of chromosomes which is called as chaismata. This phase occurs in pachytene phase and is visible in diplotene phase when the protein coat dissolves.
Step 1: Line the slide up under the microscope until he can see the blurry slide
Step 2: Slowly turn the large focus knob until the object becomes less blurry
Step 3: If the microscope has a small focus knob then slowly turn that until object is no longer blurry
