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How does Meiosis increase variation?

In the first stage of Meiosis 1 - Prophase 1, after the chromosomes have coiled and condensed they ay touch each other at points known as chiasmata, and Crossing Over occurs. This is where genetic informatio...
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Answered by Bobbie C. • Biology tutor
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What is the difference between cells, tissues, organs and organ systems?

You can think of these 4 things as a hierarchy, where each 'element' is a building block for the next level. The smallest 'unit' are cells . There are trillions of cells in your body and these cells together...
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Answered by Callum G. • Biology tutor
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What is the difference between an artery and a vein?

Arteries and veins both carry blood around the body, and they each have three main layers of tissue (a ring of endothelial tissue at the centre of the blood vessel surrounded by a layer of muscle and elastic...
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Answered by Emily W. • Biology tutor
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What are the functional differences between RNA and DNA

DNA is the medium which encodes the information that makes an organism what it is. DNA usually forms a double stranded structure and encodes genes and other regulatory elements. RNA can act as either catalys...
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Answered by Rosewan A. • Biology tutor
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What are is the function of a ribosomes and what is it made from?

Ribosomes translate (read) messenger RNA to produce specific polypeptide chains (proteins). The Ribosome itself is made up rRNA which forms the structures which read the messenger RNA and add peptides to the...
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Answered by Rosewan A. • Biology tutor
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