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Biology Dictionary for GCSE Biology and A Level Biology

 

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

I

Inbreeding: The breeding of genetically similar individuals e.g. bothers and sisters. This is bad. It promotes homozygosity and increases the chance of genetic disease.

Incidence (incidence rate): Number of new cases of a particular disease in a population.

Incomplete dominance: When two alleles both exert an effect. e.g. in the Human ABO blood groups, A and B are codominant over O.  

Incubation period: The time taken for signs and symptoms to appear following entry of a pathogen  into a host organism.

 

Independent assortment: A key feature of meiosis, which separates the homologous chromosomes so that any one of a pair of alleles can pass into a gamete with one from any other pair.

Index case: The first recorded case of a disease in an outbreak (endemic, epidemic or pandemic).

 

Induced Mutations: Mutation(s) caused by direct exposure to a known mutagen.

Infection: The invasion of a host by a microorganism with subsequent establishment and multiplication of the agent. An infection may or may not lead to overt disease.

 

Insecticide: Chemical that kills insects.

 

Intensive farming: Production of high yields from a small land area.

As I write the biology dictionary and make the videos to help you learn the definitions by listening in addition to reading them, you'll get the added benefit of hearing and learning the correct pronunciation of biological terminology - but there's more! I'm also making some interactive revision flashcards too! So you can revisit the key words when revising and really embed those a level biology definitions in your head! - The flashcards will be like this (See image below and click to download).

A-Level Biology is a whole lot easier when you know the definitions of commonly used words. This biology dictionary is here to help you learn those A level biology definitions. Remember, a good command of biological terminology (at GCSE but especially at A level) can mean the difference between a poor grade and an excellent one! Since of course you get marks awarded for using the correct biological definitions in the right context when answering exam questions and writing up lab work, coursework and assignments.

The biology dictionary is mainly aimed at a level biology students since at a level, the amount of new technical language expect is quite a lot!

 

Make learning biology definitions a regular part of your studies and keep checking in as more keywords and gcse biology definitions and a level biology definitions are added.

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Helping you to Learn, Revise, Practice and Succeed in your GCSE and A-Level Biology.

*Note this A-Level biology Dictionary / Glossary of key terms is not comprehensive and will be updated and added to regularly, so keep checking in and make learning and revising a level biology definitions a consistent part of your biology studies

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