ReproductionEdexcel GCSE Biology: Flashcards

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What is asexual reproduction?

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What is asexual reproduction?: Reproduction from one parent, no gamete fusion, identical offspring.
Two advantages of asexual reproduction?: No need to find a mate; rapid reproductive cycle.
Main disadvantage of asexual reproduction?: No variation, so the whole population is equally vulnerable.
Define sexual reproduction.: Fusion of male and female gametes from two parents, producing varied offspring.
Main advantage of sexual reproduction?: Produces variation, improving survival chances if conditions change.
Main disadvantage of sexual reproduction?: Requires finding a mate; slower cycle.
What is meiosis?: Cell division in reproductive organs producing gametes.
How many daughter cells does meiosis produce?: Four.
Chromosome number of meiosis daughter cells vs parent?: Half (haploid).
Why are meiosis's gametes genetically different?: Each of the four cells gets a different combination of chromosomes.
Define haploid.: Half the normal chromosome number.
Define diploid.: Full chromosome number.
How is diploid number restored?: Two haploid gametes fuse at fertilisation.
What is a clone?: A genetically identical copy of the parent.