Search our library of Biology GCSE questions

Top answers

Biology

GCSE

What is an allele?

Simply put, it is a form of a gene which can lead to different phenotypes, e.g. eye colour. There is one allele that codes for blue eyes and another allele that codes for brown eyes.

Answered by Amy W. • Biology tutor

3794 Views

What is a punnett square?

A punnett square is a diagram that is used to predict the outcome of a particular cross or breeding experiment. This can be used for plants, animals and humans.

Answered by Amy W. • Biology tutor

5193 Views

I don't understand the difference between aerobic and anaerobic respiration

Aerobic respiration is respiration that uses oxygen and glucose, whilst anaerobic respiration is respiration that only uses glucose. As you can see in the equations for both types of respiration:

Answered by Arabella K. • Biology tutor

6238 Views