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Four mark question Can use drawn example to show the comparison of a three chambered heart to that of a four chambered heart.(2)Name the different parts of the heart. Mammalian is two atria, two ventricle...

Mitosis is the DNA replication stage in somatic cells (non sex cells). It involves replication of DNA and ONE division of DNA to produce two genetically identical daughter cells. The stages specific to mi...

The process starts in the nucleus A gene (section of DNA coding for a protein) unwinds, and the 2 DNA strands making it up unzip Transcription then occurs - one DNA strand is used as a template to make mR...

Okay so, so far you've probably covered a bit about DNA, how it's stored in chromosomes and what genes are for. Inheritance is now simply about how a gene that comes from your mum and a gene that comes fr...

Homologous chromosomes pair up during meiosis and contain one paternal and one maternal chromosome. So, these chromosomes are the same length, have the same centromere loci and contain the same sequence o...