Question

what is a genotype? a specific characteristic of a living thing the written expression of two alleles an actual physical trait resulting from alleles a different version of a gene

Explanation:

A genotype is the genetic makeup of an organism, which is represented by the combination of alleles (versions of genes) it has. It is written in a symbolic way to show the two alleles (for diploid organisms) for a particular trait. For example, in pea plants, for the height trait, \( TT \), \( Tt \), or \( tt \) are genotypes.

• Option 1: A specific characteristic of a living thing is a phenotype (e.g., tall height in pea plants), not a genotype.
• Option 3: An actual physical trait resulting from alleles is also a phenotype.
• Option 4: A different version of a gene is an allele, not a genotype.

Answer:

B. The written expression of two alleles