Meiosis – sexual reproduction (Edexcel GCSE Biology): Flashcards
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Definition of meiosis
Definition of meiosis
Formation of 4 non-identical cells from 1 cell
Location where meiosis occurs
Location where meiosis occurs
Reproductive organs
Cells produced by meiosis
Cells produced by meiosis
Gametes
No. of chromosomes in human gametes
No. of chromosomes in human gametes
23
No. of cells produced by meiosis
No. of cells produced by meiosis
4
Genetic variation in gametes
Genetic variation in gametes
All genetically different
Cause of genetic variation in gametes
Cause of genetic variation in gametes
Chromosomes shuffled during meiosis
Chromosome no. after fertilisation
Chromosome no. after fertilisation
46
Type of division after fertilisation
Type of division after fertilisation
Mitosis
Differentiation in embryo development
Differentiation in embryo development
Cells take on different roles
Location of male gametes in flowering plants
Location of male gametes in flowering plants
Pollen
Location of female gametes in flowering plants
Location of female gametes in flowering plants
Ovaries at bottom of stigma
No. of divisions in meiosis
No. of divisions in meiosis
2
Definition of haploid
Definition of haploid
Cells with single set of each chromosome
Result of first meiosis division
Result of first meiosis division
2 cells, each with one copy of each chromosome