Answer:
Arginine
Explanation:
The biochemical pathway for synthesis of arginine from its precursor includes the formation of ornithine from precursor. Ornithine serves as precursor for formation of citrulline which is then converted into arginine.
The "arg-3" mutants of Beadle and Tatum experiment were defective in the gene that code for the enzyme required to convert citrulline into arginine. These mutants could grow only when arginine was supplemented in the medium.
<span>ADAPTATION
People in living in areas with steep mountains actually has an advantage when it comes to agriculture because there is already a free and vacant space that can be used to plant crops. In order to develop thesemountains into an area where planting is easily done, the people can create a stair-like structure on the edges of the mountains where they can plant crops that will be used daily and even sold in the market. This practice will be a very good strategy to make use of the steep mountain which is the only available natural resource at the time.<span>
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I) Alleles is the alternative form of a gene or in other terms the variant form of a gene. If there are two alleles at a locus p and q are used to represent their frequencies. Frequencies of all alleles in a population will add up to 1.
Therefore, in this case if red allele CW is p=0.7, then the frequency of the white allele in this population (q) is 0.3.
ii) From the punnet square the expected genotypes frequencies in the offspring generation will be 0.49 CRCR (red flowers, o.42 CRCW (pink flowers) and 0.09 CWCW (white flowers).