MYTUTOR SUBJECT ANSWERS

737 views

How does natural selection work?

Note: Keywords which are vital for marks will be highlighted in bold.

 

Within all populations, there is variation.

This is due to different alleles (types) of different genes being present in different individuals. (We are all different heights - this is an exapmple of variation).

 

Random mutations of genes are constantly occuring within individuals. These mutations form different alleles. 

 

These mutations may change something in the body. This could be disadvantageous, make no difference, or be advantageous.

 

Individuals with these advantageous alleles will survive longer than others without this advantage.

Therefore they will reproduce more, and pass on this allele more.

 

Over many generations, this will lead to an increase in frequency of these alleles - more and more people will have this allele.

 

The allele is therefore selected for. This is Natural Selection.

Zuhayr A. Mentoring -Medical School Preparation- tutor, Mentoring -Pe...

2 years ago

Answered by Zuhayr, a GCSE Biology tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

270 SUBJECT SPECIALISTS

£24 /hr

Victoria S.

Degree: Physiology (Bachelors) - Liverpool University

Subjects offered:Biology, Maths

Biology
Maths

“Here to help with last minute revision prep! I'm Tory, in my final year studying Physiology at Uni of Liverpool and am a 5* rated tutor here to suit your needs.”

£20 /hr

Ruchira R.

Degree: BA English (Bachelors) - Exeter University

Subjects offered:Biology, Maths+ 2 more

Biology
Maths
English Literature
.ELAT

“About Me I am currently studying English at the University of Exeter. I've taught children from a wide range of age groups before, including my own peers. AS I have studied English, Maths and Biology at A Level and obtained an A in ea...”

John D. GCSE English tutor, A Level English tutor, GCSE Biology tutor...
£30 /hr

John D.

Degree: English language and literature (Bachelors) - Oxford, University College University

Subjects offered:Biology, English Literature+ 3 more

Biology
English Literature
English Language
Chemistry

“Hello hello About me: I am a third year English Literature and Language Student at University College, Oxford. Amongst the things I feel most strongly about our drama, literature and teaching. I am a student ambassador at my college ...”

About the author

£18 /hr

Zuhayr A.

Degree: Medicine (Bachelors) - Kings, London University

Subjects offered:Biology, Maths+ 5 more

Biology
Maths
Chemistry
.UKCAT.
.BMAT (BioMedical Admissions)
-Personal Statements-
-Medical School Preparation-

“Experienced tutor, medical student from Kings College London. Not only do I know my stuff, I know how to explain it simply and in a non-boring way to make sure you'll understand and remember it!”

MyTutor guarantee

You may also like...

Posts by Zuhayr

How do distinguish myself from the rest when applying to medical school?

How does natural selection work?

How to do well in the UKCAT?

What are the limiting factors of Photosynthsis

Other GCSE Biology questions

What is the difference between Dominant and Recessive alleles?

Outline how nerve impulses are transmitted along a nerve fibre.

How would a vaccine prevent someone getting an infection?

How is a leaf adapted for photosynthesis?

View GCSE Biology tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok