Describe the meaning of the terms: gene, genetic locus, alleles, phenotype and genotype

A gene is a length of DNA that codes for a particular trait. ( Think of- jeans - they are long items (length) of clothing, what they're made out of determines what they are. This is a key concept of genetics)
The position of a gene on the chromosome is called the genetic locus . (LOCus LOCation)
For each gene there are alternative forms called alleles. (ALleles ALternatives)
The two alleles represent a genotype. This is the genetic make - up of an organism (GENotype -think GENetics)
The actual appearance of the trait represents the phenotype (PHenotype - think PHoto - how it appears)

EM
Answered by Eoin M. Biology tutor

3054 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

What can be used to treat people with coronary heart disease?


Difference in structure of arteries and veins and how this relates to their function


What is Evolution?


Explain how Natural Selection occurs?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences