Article

Uniquely me – introduction

What makes me, me? My genes or my environment?

How we look and act is the result of the interaction of our genes with our environment. Even identical twins, with an identical genetic make-up, have unique phenotypes. Find out what makes each of us unique.

Identical twin young women.

Identical twins

Identical twins have the same DNA, but they always have some variation in the way they look and act. This uniqueness is a result of the interaction between genetic make-up and environmental influences.

Rights: Image licensed through 123rf.com

Take a closer look at the people around you. Chances are you’ll recognise that, while you share many features in common with them, there are other features and behaviours they have that are quite different from yours. For example, we all have 2 eyes but they come in many different colours and shapes.

Why are we the way we are?

Apart from identical twins, each of us has a unique genetic make-up that provides the instructions for our growth and development. However, how you look and act (your phenotype) is actually a result of the interaction between your genetic make-up and your environment.

Some of these interactions happen before we’re even born, during embryonic development. Other influences, including environmental factors such as diet, can shape your appearance and behaviour as you develop from baby to child to adult.

In our collection of resources, we explore two fundamental questions:

  • Why are we the way we are?

  • How does this happen?

Meet our scientists

We meet 4 scientists who are actively involved in research to learn more about the interactions between genetic and environmental factors:

Dr Julia Horsfield with zebrafish experiments behind her.

Dr Julia Horsfield

Dr Julia Horsfield’s lab uses zebrafish as a model organism. Their embryos develop externally in transparent eggshells, making it possible to watch the animal develop through a microscope over a couple of days.

Rights: The University of Waikato Te Whare Wānanga o Waikato

Explore the science, then take up the challenge

The articles DNA, chromosomes and gene expression and Meiosis, inheritance and variation take a closer look inside our cells to explain some of the ideas fundamental to finding out what makes each of us unique.

The student activities have been designed to address common alternative conceptions about genetics.

Genetics: true or false? can be combined with Genetics web quest and used at the start and/or end of a genetics unit.

Family resemblance: traits through generations involves the whole class and helps to illustrate the basic processes by which genetic information is passed from one generation to the next.

And of course, any teaching resource about DNA needs a link to forensics, so do try out DNA detective!

Question bank

The Uniquely me – question bank provides a list of questions about how unique we as humans are and places where their answers can be found. The questions support an inquiry approach.

Key terms

For explanations of some of the key concepts, see Uniquely me – key terms.

Timeline

The timeline - Fertilisation to adulthood - gives information on the key stages in the development of a human.

Published:18 May 2011