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Chromosomes

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A series of free Science Lessons for 7th Grade and 8th Grade, KS3 and Checkpoint Science in preparation for GCSE and IGCSE Science.

Chromosomes and Genes
Humans have 23 pairs of chromosomes. Other organisms have different numbers. Genes that control characteristics are found on chromosomes.



How to extract DNA from strawberries?
How we inherit different characteristics such as eye colour? Discuss about genes including dominant and recessive alleles.
Inheritance
How to extract DNA from strawberries using everyday household items? How to extract DNA from your saliva?

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
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