MYTUTOR SUBJECT ANSWERS

669 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

262 SUBJECT SPECIALISTS

£22 /hr

Bobola A.

Degree: Medicine (MBChB - Bachelor of Medicine, Bachelor of Surgery) (Bachelors) - Liverpool University

Subjects offered:Biology, Human Biology+ 2 more

Biology
Human Biology
-Personal Statements-
-Medical School Preparation-

“I believe that genuine enthusiasm is the way in which we can inspire, encourage and teach students. It's what I plan to bring to all my tutoring sessions”

£20 /hr

Naomi S.

Degree: Medicine (Bachelors) - Trinity College Dublin University

Subjects offered:Biology, Music+ 4 more

Biology
Music
Maths
Human Biology
Chemistry
-Medical School Preparation-

“*Available to teach exam revision sessions immediately.* I'm a medical student at Trinity College Dublin. ”

£18 /hr

Jay G.

Degree: Biological Sciences (Biochemistry) (Bachelors) - Edinburgh University

Subjects offered:Biology, Maths+ 2 more

Biology
Maths
Mandarin
Chemistry

“I am here not only to help you get better at exams, but to help you enjoy your subject more ”

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 the nervous and endocrine systems in maintaining homeostasis?

What is a concentration gradient?

How is oxygen moved from the lungs to the blood?

What is Homeostasis and how does it work?

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