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.
Answer:
fiber, antioxidants, vitiman c
Explanation:
so fiber for digestvie health
antioxidants for disease provention
not sure if thats the answer ur looking for
Answer:
Its 0N
Explanation: 50 and 50 pulling from each side will be 0 its like 50-50 from each side wich equals 0
<span>The answer is A. Roast Beef because all ground meat, injected, or marinated meats must be cooked to 155 degrees to kill any microorganisms that may cause sickness. Roast Beef is a marinated or 'flavor injected' meat therefore it requires the 15 seconds of 155 degree temperature reading.</span>
1 Troposphere
2 Stratosphere
3 Mesosphere
4 Mesosphere
5 Thermosphere
6 Stratosphere
7 Troposphere
i hope this helped!!
