Evolution And Inheritance (Year 6): Everything You Need To Know

Girls sat at the desk in the science classroom learning about evolution and inheritance.
Share
Tweet

Image © Pexels.

Helping your Year 6 child with their KS2 learning isn't always an easy task; especially when trying to tackle the enormity of evolution and inheritance.  

Kidadl's handy guide will lead you through the topics covered in KS2 lessons about evolution and inheritance. Year 6 school pupils are encouraged to draw on their understanding of earlier KS2 science teaching as they learn about the importance of fossils, the relationship between inheritance and adaptation, and how adaptation may lead to evolution.

Evolution And Inheritance Year 6 Learning

In Year 6, as part of KS2 learning, children are taught about evolution and inheritance. They learn that:

  • Over millions of years, living things have changed and adapted to suit their environment.
  • Studying fossils helps us to learn about the processes of inheritance and evolution,  and provides us with information about plants and animals that lived on Earth a long time ago.
  • Living things produce offspring that are similar to them, but these offspring vary and do not have entirely identical characteristics to their parents.
  • Animals and plants are adapted to suit their habitat, and gradual adaptation may lead to evolution.

Fossils

Lots of fossils, including spiral fossils, in stone.
Image © Budimir Jevtic under a creative commons licence.

Scientists began to learn about extinct animals and plants in the 19th century, via the discovery of fossils. Fossils are rocks that contain the impression or the preserved remains of prehistoric animals and plants. They can tell us a lot about how living things have changed over many millions of years.

For example, from studying fossils, we know that 60 million years ago, horses were the size of dogs and lived in rainforests. Over time, they adapted so that they were bigger and stronger and able to live in different environments.

Diagram showing the evolution of the horse.
oopImage © Aldona under a creative commons licence.

Mary Anning

Mary Anning was one of the first fossil hunters and is famous for discovering many rare fossils, including a five-metre skeleton of an ancient sea reptile. She was born in 1799 in the English seaside town of Lyme Regis, where she discovered an incredible number of prehistoric fossils of extinct creatures.

Evolution

The planet Earth is estimated to be 4.54 billion years old and to contain 8.7 million species of living things. During Earth’s lifetime, many species of plants and animals have died out and become extinct, many have changed the way they look and function, and many new species have been created. This is known as evolution.

From studying fossils, scientists learned that livings things change over time. They realised that, many years ago, there were animals and plants that no longer exist today. Fossils also helped scientists to understand that many traits of extinct species have been passed down and can be identified in things that do live today. However, they could not explain how this happened or why there is such a huge variety of animal and plant species.

Charles Darwin

Cartoon drawing of Charles Darwin holding up a skull in either hand.
Image © matiasdelcarmine under a creative commons licence.

In 1809, Charles Darwin was born in Shrewsbury, England. He was a scientist who, like many others, believed that living things have changed and adapted over billions of years. He wanted to know how and why this happened so, in 1831, he set sail, in a ship called The Beagle, on a five-year voyage around the world to try to find out.

Darwin’s research led him to formulate his theory of evolution by natural selection. In 1859, he explained this theory in his book “On the Origin of Species”. Darwin had learned that:

  • The offspring of animals and plants have slightly different characteristics to their parents. This is called variation.
  • The different characteristics that the offspring have give them either a better or a worse chance of survival in different conditions. This is called natural selection.
  • Plants and animals that are born with features most suited to their habitat have the highest chance of survival and are able to produce more offspring and pass down their advantageous characteristics.
  • Over millions of years, this process results in living things changing to suit new environments, dying out, or creating completely new species.

One of the species studied by Darwin were the finches that live on the Galapagos Islands. He learned that, over time, as food sources changed, so the birds beaks adapted to shapes that made it easier for them to pick up the food that was available to them.

Diagram of Darwin's finches which he studied.
Image © CNX OpenStax / CC BY under a creative commons licence.

Adaptation

Darwin’s theory of evolution by natural selection shows that the features, and even the behaviours, of all living things have changed and evolved over time to suit their environment. This is called adaptation. The process of natural selection means that the animals and plants with the strongest adaptations are most likely to survive. This is also known as “survival of the fittest”. Adaptation may lead to the creation of entirely new species.

Over the years, habitats have altered and, consequently, living things have changed; animals and plants are adapted to suit their environment. Changes in habitat may be gradual, or they may happen quite quickly. If the animals and plants that live in changing habitats don’t adapt then they risk dying out and becoming extinct.

Examples Of Adaptation

  • Most rabbits have dark fur, but rabbits that live in places that snow a lot have adapted and have white fur as it gives them a higher chance of survival.
  • Cacti have adapted by developing long roots to collect water so that they can survive in the desert.
  • African elephants live in a very hot habitat and so have adapted to have very large ears that they are able to flap in order to stay cool.
  • Chameleons have adapted so that they can change colour and camouflage themselves from predators.
  • Water lilies have adapted to develop large, flat leaves that enable them to float.
  • Fish have adapted so that they are able to live in the water, by developing gills.
  • In order to be able to fly, birds have adapted their bodies to include wings.

Human Evolution And Adaptation

Cartoon showing human evolution.
Image © vectorpouch under a creative commons licence.

Like all living things, humans have evolved and adapted over many years. We have learned about the evolution of the human body from the work of scientists who study human fossils. These scientists are called paleoanthropologists and they have discovered that, for millions of years, human bodies and behaviour have changed in accordance with changing environments and needs. Humans have learned to stand upright and walk on two feet. We have developed thumbs that enable us to grip better and hold things more easily. Our brains have got bigger and we have developed sophisticated speech.

Inheritance

Parents smiling with their son, their face all inline so we can see any resemblance.
Image © fizkes under a creative commons licence.

When animals and plants reproduce, their characteristics are passed on to their offspring. This is known as inheritance. Offspring are similar to their parents, but they are not exactly the same because they usually inherit a combination of characteristics.

For example, a human child may resemble both its parents, but may have inherited brown eyes from one parent and blonde hair from the other parent. Similarly, if a puppy has parents that are two different breeds of dog, it will have certain characteristics inherited from each of the breeds.

Ten Fun Facts For Year 6 Pupils

  • Dragonflies existed before dinosaurs.
  • Birds evolved from dinosaurs.
  • The biggest Tyrannosaurus rex fossil ever discovered was unearthed in Canada in 2019. It was 42 feet long and weighed nearly 10 tons.
  • Whales used to have legs and be able to walk on land.
  • Humans develop a tail while they are in the womb but it dissolves before they are born.
  • It took Charles Darwin 20 years to write his book about the theory of evolution.
  • No two animals (even of the same species and family) are exactly the same.
  • There are 340 different breeds of dog, all of which evolved from a wild wolf that lived 40,000 years ago.
  • Instinct plays a crucial role in natural selection. For example, birds instinctively know that they must travel to hotter climes in the winter.
  • We’ll probably never know about all of the species of plants and animals that have existed over the lifetime of Earth.
Disclaimer

Disclaimer

At Kidadl we pride ourselves on offering families original ideas to make the most of time spent together at home or out and about, wherever you are in the world. We strive to recommend the very best things, that are suggested by our community and are things we would do ourselves - our aim is to be the trusted friend to parents. 

We try our very best, but cannot guarantee perfection. We will always aim to give you accurate information at the date of publication - however, information does change, so it's important you do your own research, double-check and make the decision that is right for your family.  

Kidadl provides inspiration for everything from family days out to online classes, arts, crafts and science experiments. We recognise that not all activities and ideas are appropriate and suitable for all children and families or in all circumstances. Our recommended activities are based on age but these are a guide. We recommend that these ideas are used as inspiration, that ideas are undertaken with appropriate adult supervision, and that each adult uses their own discretion and knowledge of their children to consider the safety and suitability.

Kidadl cannot accept liability for the execution of these ideas, and parental supervision is advised at all times, as safety is paramount. Anyone using the information provided by Kidadl does so at their own risk and we can not accept liability if things go wrong. 

Kidadl is supported by you, the users. When you buy through the links on our site we may earn a commission.

All prices and product availability were correct at the time of publication.

We also link to other websites, but are not responsible for their content.

Inspiration straight to your inbox, every week