Genes

a. are specific nucleotide sequences
b. occur in numbers that are the same as the number of chromosomes
c. are located in a specific place on a chromosome
d. determine the traits of an organism
e.
are units of rna

The correct option is D. Genes determine the trait of an organism.

Explanation:

Option D is correct because genes can be described as the hereditary molecules that determine the characteristics of a person.

Option A is false because each gene is made up of different nucleotide sequences.

Option B is false because genes do not occur as the same number of chromosomes. Rather, there are many genes present on a single chromosome.

Option C is false because all genes are not located in a specific location. Each gene has its specific location on the chromosome which is known as its locus.

Option E is false because genes are not units of RNA. Genes are made up of DNA.

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the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.