What is an allele?

An allele is a variant form of a gene that is located at a specific position (locus) on a particular chromosome. Each gene may have different versions, or alleles, that can lead to variations in traits among individuals. These variations can affect everything from physical characteristics, such as eye color, to susceptibility to certain diseases.

The term "coding sequences in genetics" accurately reflects the role of alleles in genetics. They contribute to the diversity within a species and are fundamental to genetic inheritance. Alleles can be dominant or recessive, influencing how traits are expressed in an organism. Understanding alleles is crucial for genetics, as they form the basis for genetic variation and are integral to studies in biological and psychological sciences.

In contrast, the other options do not accurately capture the essence of what an allele is. Medications for anxiety, behavioral responses to stimuli, and psychological disorders do not pertain to genetic variations or the genetic basis of traits, highlighting the importance of grasping the correct concept in the context of genetics and abnormal psychology.