Genotype is the term used to describe an organism's genetic make-up.

• A. Phenotype
• B. Genotype
• C. Chromosome complement
• D. Chromatin

Answer: (B)

Genotype describes the organism's genetic makeup—the specific alleles present at each gene locus that the organism has inherited. This internal genetic information is passed to offspring and determines potential traits, though the actual phenotype arises from how those genes interact with each environment. The outward appearance and traits are called the phenotype, which means phenotype is influenced by genotype plus environmental factors. The chromosome complement refers to the total number and structure of chromosomes in a cell, not the exact alleles carried. Chromatin is the DNA packaged with proteins inside the nucleus, important for packaging and regulation, but it doesn’t itself define the organism’s specific genetic makeup. So the term that best fits describing the genetic makeup is genotype.