Gene Evolution and Mutation Concepts

The video explores the concept of genes, their origins, and evolution. It explains how genes encode molecules essential for life and how they have evolved from primitive microbes to complex organisms. Gene duplication and mutations play a crucial role in creating new gene functions. Recent human evolution has seen the emergence of new genes, which quickly take on essential roles. The video also discusses how non-coding DNA can mutate to form new genes, contributing to the diversity of life on Earth.

What is the approximate number of genes in human DNA?

• 40,000

• 10,000

• 30,000

• 20,000

Which of the following is NOT mentioned as a molecule encoded by human genes?

• Dopamine

• Collagen

• Chlorophyll

• Keratin

How long ago do scientists believe life started on Earth?

• 5 billion years ago

• 4 billion years ago

• 3 billion years ago

• 2 billion years ago

What process can lead to the creation of new genes?

• Gene duplication

• Gene deletion

• Gene silencing

• Gene splicing

How do mutations affect duplicated genes over generations?

• They always become harmful

• They remain unchanged

• They become non-functional

• They may acquire new functions

What is an example of a significant change in gene function due to mutation?

• Production of venom in snakes

• Creation of dopamine in humans

• Formation of spider silk

• Development of chlorophyll in plants

In the example of snakes, where did the mutated gene become active?

• In the liver

• In the pancreas

• In the mouth

• In the brain

What is the role of non-coding DNA in gene evolution?

• It encodes essential proteins

• It prevents gene duplication

• It can mutate to create new genes

• It always remains non-functional

What can random mutations in non-coding DNA lead to?

• Destruction of existing genes

• Formation of new functional genes

• Stabilization of genetic sequences

• Creation of harmful proteins

What is the ongoing process mentioned in the context of gene evolution?

• Gene deletion

• Gene evolution

• Gene silencing

• Gene duplication