MYTUTOR SUBJECT ANSWERS

451 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

187 SUBJECT SPECIALISTS

£18 /hr

Ross N.

Degree: Medicine (Bachelors) - Exeter University

Subjects offered: Biology, Maths+ 2 more

Biology
Maths
Chemistry
.UKCAT.

“About Me: I'm Ross and I'm a Medical Student at the University of Exeter. I strongly believe that science + maths are incredibly interesting and fun subjects when you understand them - I intend to help you do just that. I am a high e...”

£18 /hr

Thomas D.

Degree: Neuroscience (Bachelors) - Kings, London University

Subjects offered: Biology, Science+ 3 more

Biology
Science
Physics
Maths
Chemistry

“I am currently in my second year of a Neuroscience Bachellors' degree at a Russel Group institution, that is King's College London. Having done five (yes 5) A2s, and achieved an A* and 5 As, I know a few tricks of the trade so to spea...”

£18 /hr

Jed M.

Degree: Natural Sciences (Bachelors) - Exeter University

Subjects offered: Biology, Maths+ 1 more

Biology
Maths
Chemistry

“Hi! I'm a second year Natural Science student at the University of Exeter. I love all things science, and enjoy sharing what I know about it with others. For my GCSEs and A Levels, I found worked examples and practice questions are ke...”

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 are the differences between mitosis and meiosis?

What is an enzyme?

Explain why your genes might influence how drugs work in the body. (3)

What is Natural Selection?

View GCSE Biology tutors

Cookies:

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

mtw:mercury1:status:ok