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Biologymad A Level
Found 2 free book(s)DNA (DNA = deoxyribonucleic acid) - BiologyMad A-Level …
www.biologymad.comDNA (DNA = deoxyribonucleic acid) • DNA is the genetic material of all living cells and of many viruses. • DNA is: an alpha double helix of two polynucleotide strands. • The genetic code is the sequence of bases on one of the strands. • A gene is a specific sequence of bases which has the information for a particular protein. • DNA is self-replicating - it can make an identical copy ...
Meiosis. - BiologyMad A-Level Biology
www.biologymad.com2) In Metaphase I, the homologous pairs of chromosomes line up randomly across the equator of the cell, so each daughter cell will get a random mixture of ‘mother’ and ‘father’ chromosomes. This is known as ‘independent assortment’ and is the second cause of variation.