Meiosis (AQA A-Level Biology): Flashcards
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Number of cells produced by meiosis
Number of cells produced by meiosis
Four haploid gametes
Diploid definition
Diploid definition
Cells with two complete sets of chromosomes (46 in humans)
Haploid definition
Haploid definition
Cells with one complete set of chromosomes (23 in humans)
Number of nuclear divisions in meiosis
Number of nuclear divisions in meiosis
Two consecutive divisions
Gene definition
Gene definition
A length of DNA that codes for a polypeptide
Locus definition
Locus definition
Position of a gene on a chromosome or DNA molecule
Allele definition
Allele definition
One of the different forms of a particular gene
Homologous chromosomes definition
Homologous chromosomes definition
Chromosome pair (maternal & paternal) with same gene loci
Crossing over process
Crossing over process
Exchange of equivalent portions of chromatids
Main purpose of meiosis
Main purpose of meiosis
Halves chromosome number, prevents doubling in reproduction