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What is Mitosis?

During mitosis , one cell divides into two daughter cells. First, the cell grows and doubles the amount of DNA (in human cells from 23 pairs of chromosomes to 46 pairs of chromosomes). During the different s...
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Answered by Simone V. • Biology tutor
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Name the 5 stages of mitosis in order

I remember using this handy mnemonic: "IPMAT". I nterphase P rophase M etaphase A naphase T elophase It may be useful to you to write this down straight away on an extra piece of paper at the start...
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Answered by Luke R. • Biology tutor
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What are the differences between DNA and RNA?

There are three main differences between DNA and RNA: 1. RNA has the base uracil instead of the base thymine . These bases are very similar and differ by only one chemical group! 2. RNA nucleotides have a ri...
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Answered by Charlotte C. • Biology tutor
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Why are organisms within a species genetically different?

1) Crossing over - in Prophase I of meiosis, non-sister chromatids in the same bivalent (i.e. chromatids on separate chromosomes within a homologous pair) can exchange alleles, creating new combinations. 2) ...
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Answered by Katherine F. • Biology tutor
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What is transcription?

Transcription is the formation of an mRNA molecule from its complementary DNA template. First the enzyme DNA helicase unwinds the double helix, and the hydrogen bonds between complementary bases break. This ...
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Answered by Katherine F. • Biology tutor
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