Meoisis (Leaving Cert Biology): Flashcards
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What is meiosis?
What is meiosis?
Nuclear division producing daughter cells with half the chromosomes
Type of cells produced by meiosis
Type of cells produced by meiosis
Haploid cells
Where meiosis occurs in humans
Where meiosis occurs in humans
Ovaries and testes
Products of meiosis in humans
Products of meiosis in humans
Sperm and egg cells
Products of meiosis in flowering plants
Products of meiosis in flowering plants
Pollen grains and egg cells
Chromosome number in parent cell (human meiosis)
Chromosome number in parent cell (human meiosis)
46 chromosomes (diploid)
Chromosome number in daughter cells (human meiosis)
Chromosome number in daughter cells (human meiosis)
23 chromosomes (haploid)
Function of meiosis: gamete production
Function of meiosis: gamete production
Produces haploid gametes (sperm and egg cells) for sexual reproduction
How meiosis maintains chromosome number
How meiosis maintains chromosome number
Produces haploid gametes so fertilisation restores diploid number
How diploid chromosome number is restored
How diploid chromosome number is restored
Haploid gametes combine during fertilisation
Function of meiosis: variation
Function of meiosis: variation
Produces cells with different gene combinations, creating genetic variation
Mitosis vs meiosis: chromosome number in daughter cells
Mitosis vs meiosis: chromosome number in daughter cells
Mitosis maintains, meiosis halves
Mitosis vs meiosis: genetic variation
Mitosis vs meiosis: genetic variation
Mitosis: identical genes; Meiosis: different combinations
Mitosis vs meiosis: rounds of nuclear division
Mitosis vs meiosis: rounds of nuclear division
Mitosis: 1 round; Meiosis: 2 rounds
Meiosis definition
Meiosis definition
Nuclear division producing cells with half the chromosomes
Type of cells meiosis produces
Type of cells meiosis produces
Haploid cells
Where meiosis occurs in humans
Where meiosis occurs in humans
Ovaries and testes
Gametes produced by meiosis in humans
Gametes produced by meiosis in humans
Sperm and egg cells
Human parent cell chromosome number (meiosis)
Human parent cell chromosome number (meiosis)
46 (diploid)
Human daughter cell chromosome number (meiosis)
Human daughter cell chromosome number (meiosis)
23 (haploid)
Meiosis function: gamete production
Meiosis function: gamete production
Produces haploid gametes for sexual reproduction
How meiosis maintains chromosome number
How meiosis maintains chromosome number
Haploid gametes fuse at fertilisation, restoring diploid
Meiosis function: genetic variation
Meiosis function: genetic variation
Produces cells with different gene combinations
Two processes causing variation in meiosis
Two processes causing variation in meiosis
Crossing over and independent assortment