Answer:
None of the choices would lead to all identical gametes.
Explanation:
Gametes are sex cells produced by sexually reproducing organims via a process of cell division called MEIOSIS. Meiosis is a cell division process which produces four (4) daughter cells (gametes), which are genetically different from the parent cell.
The difference in genetical content is as a result of a process unique to only meiosis called CROSSING-OVER OR RECOMBINATION. This process ensures that the genetic content of the gametes are altered. Hence, since gamete formation is done via meiosis, none of the scenarios in the option will lead to all identical gametes.
Meiosis occurs in a series of different phases and creates genetically unique reproductive cells. The process which helps make meiotic cells genetically different and occurs during prophase I, but not during prophase II, is crossing over (C). Crossing over is the exchange of genetic material between two homogenous chromosomes. It is one of the final phases of prophase I. This process is called synapsis. It occurs when the matching regions on the matching chromosomes break and then reconnect to the other chromosome
Answer:
Avoid the consumption of gases dangerous to the ozone layer, due to their content or manufacturing process. Some of the most dangerous gases are chlorofluorocarbons, halogenated hydrocarbon, methyl bromide, and nitrous oxide.
Minimize the use of cars. The best transport options are urban, bicycle, or walking. If you use a car, try to carpool to decrease the use of cars. This prevents pollution.
Do not use cleaning products that are harmful to the environment. Many cleaning products contain substances that are corrosive. Replace these dangerous substances with non-toxic products such as vinegar or bicarbonate.
Buy local products. Not only do you get fresh products but you avoid consuming food that has traveled long distances. The more food is transported, the more nitrous oxide is produced due to the cars or trucks used to transport it.
Maintain air conditioners, as their malfunctions cause chemicals to escape into the atmosphere.
Explanation:
Hope this helped! =)
