Question

the sum total of all the genetic information about an organism, carried on the chromosomes in the cell nucleus is called the
○ genotype.
● genome.
○ phenotype.
○ locus.

Explanation:

To solve this, we analyze each option:

• Genotype: Refers to the genetic makeup (allele combinations) of an organism, not the total genetic info of the organism.
• Genome: Defined as the sum total of all genetic information (DNA) of an organism, carried on chromosomes in the nucleus. This matches the description.
• Phenotype: Is the observable physical/biochemical traits of an organism, resulting from genotype and environment. Not related to total genetic info.
• Locus: Is a specific position on a chromosome where a gene is located. Not the total genetic info.

Answer:

B. genome