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Genetics: Chromosomes, Genes, and DNA

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Questions and Answers

What is contained in the nucleus of every cell?

chromosomes

Human cells have 46 chromosomes.

True

What do genes help to determine in an organism?

characteristics

What is the shape of a DNA molecule?

Double helix Signup and view all the answers

Each chromosome contains many ______.

genes Signup and view all the answers

What are chromosomes made of?

DNA Signup and view all the answers

Study Notes

Chromosomes

Found in the nucleus of every cell, chromosomes are thread-like structures.
Not easily visible under a microscope due to their tightly coiled structure.
The number of chromosomes varies across different species; humans have 46 chromosomes.

Genes

Each chromosome consists of hundreds of genes.
Genes are responsible for controlling specific characteristics within an organism.
They play a crucial role in determining the traits passed from parents to offspring.

DNA

Chromosomes and genes are composed of DNA (deoxyribonucleic acid).
The structure of DNA is characterized by a double helix shape.
DNA carries the genetic instructions necessary for the growth and functioning of living organisms.

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Description

This quiz covers the fundamental concepts of genetics, focusing on chromosomes, genes, and DNA structures. Understand how these components contribute to determining an organism's characteristics. Test your knowledge and ability to explain these critical biological concepts.