Top answers

Biology
All levels

What is the difference between homozygous and heterozygous?

Homozygous means there are two copies of the same allele present at a specific locus (position) on a chromosome, e.g. two copies of the allele for blue eyes. Whereas, heterozygous means there are two copi...

AW
Answered by Amy W. Biology tutor
9451 Views

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. 

AW
Answered by Amy W. Biology tutor
3821 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. 

AW
Answered by Amy W. Biology tutor
5246 Views

Compare and contrast the similarities and differences between meiosis and mitosis.

Both are forms of cell division.Both are used during gametogenesis (formation of gametes or sex cells such as spermatozoa and oocytes).Only mitosis is used during cell division of somatic or body cells.Me...

SP
Answered by Sally P. Biology tutor
36256 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:

AK
Answered by Arabella K. Biology tutor
6304 Views

We're here to help

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

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning