Chromosomes

Chromosomes are thread-like structures located in the nucleus of animal and plant cells. They are made of protein and a single molecule of deoxyribonucleic acid (DNA). DNA contains the genetic instructions that make each living organism unique.

Structure of Chromosomes

Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure. The DNA and proteins are condensed to form chromatin, which further condenses to form a visible chromosome during cell division.

Function of Chromosomes

The main function of chromosomes is to carry the genetic information needed for the growth, development, and functioning of an organism. This genetic information is passed from one generation to the next.

Study Guide

What are chromosomes made of?
Describe the structure of chromosomes.
What is the function of chromosomes?

Understanding chromosomes is crucial to comprehend the basis of heredity, genetic disorders, and the processes of cell division and reproduction.

◂Science Worksheets and Study Guides First Grade. Did you Know... 1st Grade

Study Guide

Did you Know... 1st Grade

Worksheet/Answer key

Did you Know... 1st Grade

Worksheet/Answer key

Did you Know... 1st Grade

Worksheet/Answer key

Did you Know... 1st Grade

Vocabulary/Answer key

Did you Know... 1st Grade

Vocabulary/Answer key

Did you Know... 1st Grade

The resources above cover the following skills:

Concepts of Life Science (SC1, SC2, SC3)

The student demonstrates an understanding that all organisms are linked to each other and their physical environments through the transfer and transformation of matter and energy by identifying and sorting examples of living and non-living things in the local environment. (L)

The student demonstrates an understanding that all organisms are linked to each other and their physical environments through the transfer and transformation of matter and energy by organizing a simple food chain of familiar plants and animals. (L)

Concepts of Physical Science: A student should understand and be able to apply the concepts, models, theories, universal principles, and facts that explain the physical world. A student who meets the content standard should:

Develop an understanding of motions, forces, their characteristics and relationships, and natural forces and their effects.

Concepts of Life Science: A student should understand and be able to apply the concepts, models, theories, facts, evidence, systems, and processes of life science. A student who meets the content standard should:

Develop an understanding of the structure, function, behavior, development, life cycles, and diversity of living organisms.

Develop an understanding that all organisms are linked to each other and their physical environments through the transfer and transformation of matter and energy.