The Roles of Mitosis and Meiosis (Leaving Cert Biology): Flashcards
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DNA replication
DNA replication
Duplicates genetic material before cell division
Purpose of DNA replication
Purpose of DNA replication
Ensures each cell gets complete genetic copy
Mitosis
Mitosis
Nuclear division maintaining chromosome number
Mitosis in single-celled organisms
Mitosis in single-celled organisms
Method of asexual reproduction
Asexual reproduction
Asexual reproduction
Reproduction without joining of two cells
Mitosis in multicellular organisms
Mitosis in multicellular organisms
Growth, repair, and replacement of cells
Daughter cells from mitosis
Daughter cells from mitosis
Two genetically identical diploid cells
Meiosis
Meiosis
Nuclear division that halves chromosome number
Daughter cells from meiosis
Daughter cells from meiosis
Four genetically different haploid cells
Gametes
Gametes
Sex cells for sexual reproduction
Fertilisation
Fertilisation
Fusion of two gametes
Chromosome number in gametes
Chromosome number in gametes
Haploid (half the normal number)
Human chromosome numbers
Human chromosome numbers
Gametes: 23, Zygote: 46
Genetic variation source in meiosis
Genetic variation source in meiosis
Chromosome exchange & different combinations
Importance of genetic variation
Importance of genetic variation
Essential for evolution and species adaptation