Science 9 SA 1.2

It is a long, coiled structure that carries the genetic instructions on how living things would grow and develop.

The basic unit of information and the carriers of hereditary information.

These are thread-like structures composed of proteins called histones and DNA molecules.

A different form of gene that controls certain traits.

The genetic makeup of an organism.

Refers to the physical characteristics of an organism as influenced by the genome and environmental factors.

An allele that expresses its trait even when paired with a recessive allele.

Allele that is only expressed in absence of a dominant allele.

The genotype that contains two of the same alleles.

The genotype that contains two different alleles.