Top answers

Biology
A Level

What's the difference between genotype and phenotype?

The genotype of an organism is the alleles it has. while the phenotype is the characteristics the alleles produce.

 

For examples the alleles for hair colour could be BB for brown hair...

LG
Answered by Lauren G. • Biology tutor
10907 Views

What are gene mutations?

A mutation is any change to the base sequence of DNA.

The different types of mutations that can occur include:

Subsitution - this is where one base is swapped for another

Delet...

LG
Answered by Lauren G. • Biology tutor
6117 Views

What is endosymbiosis and how does it relate to mitochondria?

Endosymbiosis is where two organisms live together, one inside the other: endo=in, sym=together and biosis=living.

AH
Answered by Aidan H. • Biology tutor
5632 Views

Describe the structure of the cell membrane

The cell membrane is made up of something called the phospholipid bilayer. This is exactly what it sounds like:a hydrophilic phosphate head on the outside and a hydrophobic lipid on the inside. 

<...
TW
Answered by Thomas W. • Biology tutor
6211 Views

How is a message transferred across a synapse?

A synapse is a junction between the end of one neuron (known as the pre-synaptic neuron) and either another neuron (known as the post-synaptic neuron) or...

MB
Answered by Max B. • Biology tutor
13081 Views

We're here to help

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

Company Information

CareersBlogSubject answersBecome a tutorSchoolsSafeguarding policyFAQsUsing the Online Lesson SpaceTestimonials & pressSitemapTerms & ConditionsPrivacy PolicyGender Pay Gap Reporting

Popular Requests

Maths tutorChemistry tutorPhysics tutorBiology tutorEnglish tutorGCSE tutorsA level tutorsIB tutorsPhysics & Maths tutorsChemistry & Maths tutorsGCSE Maths tutors
CEOP logo
CLICK CEOP

Internet Safety

Sagepay logo

Payment Security

Cyber Essentials logo

Cyber

Essentials

MyTutor is part of the IXL family of brands:

IXL

Comprehensive K-12 personalized learning

Rosetta Stone

Immersive learning for 25 languages

Wyzant

Trusted tutors for 300 subjects

Education.com

35,000 worksheets, games, and lesson plans

Vocabulary.com

Adaptive learning for English vocabulary

Emmersion

Fast and accurate language certification

Thesaurus.com

Essential reference for synonyms and antonyms

Dictionary.com

Comprehensive resource for word definitions and usage

SpanishDictionary.com

Spanish-English dictionary, translator, and learning resources

FrenchDictionary.com

French-English dictionary, translator, and learning

Ingles.com

Diccionario ingles-espanol, traductor y sitio de apremdizaje

ABCya

Fun educational games for kids

© 2026 by IXL Learning