Meiosis

• Sexyal reproduction leads to variation in a population, this increases chance of survival
• Mitosis is a single division whereas meiosis is a double division
• During prophasr 1 the chromatids condense but the homologous pairs of chromatids also pair up
• Once homologous pairs of chromatids pair up, the same gene loci match up and complementary sections of dna are swapped, this is known as crossing over
• Different from mitosis, homologous pairs of chromatids separate, whilst still connected by the centromere in meiosis anaphase 1
• The selection of homologous pairs for each pole is random
• Independent segregation and crossing over produces a random assortment of alleles
• In meiosis anaphase 2 chromatids separate producing haploid cells