Biology Bricks Logo

DNA & Cells

DNA and cells are linked as cells hold DNA. DNA is the building blocks of the genetic code that makes us who we are. Every organism that lives hasa DNA genetic makeup. Depending on the different organisms, whether they are microscopic bacteria, to the largest animals like elephants and whales, they each have their own version of DNA that gives them the characteristics they hold.

A double helix artwork by Adam Biggin
DNA Structure

History of DNA

Find out about the history of DNA, including when and how it was discovered, who discovered parts of it, and what we do now we know about DNA and our genome.

Find out More

DNA & RNA

Explore the differences between RNA and DNA, how they form and fuse together, what their functions are and more.

Find out More

DNA & RNA Structure
The human karyotype

Genes & Chromosomes

Our genes are what make up our characteristics, traits and the way we look. They are based on information gathered from the chromosomes passed down through generations of family.

Find out More

Haploid and diploid

Haploid & Diploid

A haploid cell contains all the information from two sets of chromosomes, also known as a pair. Diploid cells contain one set of chromosome only.

Find out More

Genotype & Phenotype

A genotype is the entire collection of alleles, or characteristics, that we have. A phenotype is a collection of characteristics you get from your genotype. If this is confusing, find out more about it here.

Find out More

Genotype and phenotype explanation
A light microscope, common in schools

Under the Microscope

Find out about the different types of microscope used in every day science, from the light microscope (you may have seen these at school), to the electron microscope.

Find out More

MRSGREN

There are seven different features that make a living organism, well... alive. This simple way to remember that is here to help you.

Find out More

How to remember the seven components for a living organism
Variation in frogs

Genetic Variation

We are all different, and so are animals, birds and insects. But why? This is due to variation, which is how we all look different to each other, but also have some similarities.

Find out More

Levels of Organisation

Find out about the size differences and how each level of organisation within the body help to make up what we use as a living organism.

Find out More

Levels of Organisation
Alternative image of a eukaryotic cell

Eukaryotic Cells; A Closer Look

Take an in-depth look at what a eukaryotic cell looks like, what's inside and how it all functions.

Find out More

Prokaryotic Cells; A Closer Look

Take an in-depth look at what a prokaryotic cell looks like, what's inside and how it all functions.

Find out More

Labelled diagram of prokaryotic cell
Types of cells in our body

Cells in Our Body

The different cells in our body have different functions, and some have no function. Find out what they all do and what they look like.

Find out More

Cells Size Comparisons

All cells are different sizes due to their function, and what they contain.

Find out More

Different cell sizes
Active transport in cells

Active Transport

How does a cell get the nutrients it needs? How does it move things about and transfer to other cells? It uses a process called active transport.

Find out More

Stem Cells

Stem cells are cells that have no function, until they are required for a function. This can be most cells, and there are different types of stem cells, depending where they are created.

Find out More

Stem cells
The process of mitosis

Cell Reproduction

Cells need to reproduce in order to keep us young and healthy. Some cells have a longer lifespan than others, and they need to be replaced with new cells.

Find out More

Cell Transport

There are different methods to moving items to and from cells, including active transport. Cells are clever in that they don't always need energy to move components from one place to another.

Find out More

Difference between diffusion and osmosis
Links to genetic disorders

Links to Genetic Conditions

There are different genetic conditions that are passed down through family generations that can not be contracted.

Find out More

Polydactyly

Polydactyly is a condition that when born, you are born with an extra appendage. Extra toes or fingers, or sometimes just a little bit of tissue. It can be treated, and often they are removed at birth.

Find out More

Polydactyly
A young adult with Down's syndrome

Down's Syndrome

Down's Syndrome is a person that has an extra 23rd chromosome. They have distinctive features, most notably that they have a flat face. They can also have learning difficulties, all which can be helped in early years of life.

Find out More

Cystic Fibrosis

A genetic condition that affects the mucus levels in your body, people with Cystic Fibrosis have to be very careful not to get ill, due to it being worse for them. It affects mostly the lungs, but can also affect other organs.

Find out More

Cystic Fibrosis explanation
A young girl with Turner syndrome

Turner Syndrome

First coined by Dr Harry Turner, Turner syndrome affects mainly females, and is the result of having 1 X chromosome instead of two.

Find out More

Patau's Syndrome

Patau's Syndrome affects babies, and is the result of an extra chromosome 13. Most babies do not survive this condition, and there is no cure for it.

Find out More

A baby with Patau Syndrome
The karyotype for Klinefelter

Klinefelter Syndrome

Klinefelter syndrome affects men, and gives them a tall stature, along with other symptoms. It can sometimes go unnoticed, and this is the result of having an extra X chromosome.

Find out More

Recognised Scientists

Scientists background
Rosalind Franklin

Rosalind Franklin

Rosalind Franklin was one of four scientists to discover and render the DNA double helix.

More...

Barbara McClintock

Barbara McClintock

An American geneticist, McClintock discovered that chromosomes can shift pattern to activate or deactivate the next one.

More...

Gregor Mendel

Gregor Mendel

Considered the father of modern genetics, Gregor Mendel researched the way dominant and recessive genes worked.

More...

The Legal Bits

Cookies | Disclaimer | About Me | Sitemap

Social Media

Facebook icon  Instagram icon  Pinterest icon

Quotes icon