101_MH_V4 | Topic 4: Genetics: Gene Expression, Genomics, and Biotechnology estion 2
Which of the following crosses will yield four phenotypes in a ratio of 9:3:3:1?
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O a. RRYY RRYY
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O b. RRYY x rryy
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O c. RrYyx RrYy
O d. RrYy x rryy
Оe. rryy x rryy
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a. the production of carbon dioxide through the process of photosynthesis

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

carbon atoms, hydrogen, oxygen, and nitrogen.