Meiosis
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17 Terms
Meiosis
Cell division producing four non‑identical haploid gametes
Haploid
Cell with one set of chromosomes
Diploid
Cell with two sets of chromosomes
Gamete
Sex cell (sperm or egg)
Genetic variation
Differences between individuals caused by meiosis
Crossing over
Exchange of DNA between homologous chromosomes
Independent assortment
Random distribution of chromosomes into gametes
Fertilisation
Fusion of two gametes to restore diploid number
What is meiosis?
Cell division producing four genetically different haploid cells
Why is meiosis important?
It produces gametes for sexual reproduction
How many daughter cells are produced in meiosis?
Four
Are the daughter cells identical or different?
Genetically different
Why are gametes haploid?
So chromosome number is restored at fertilisation
What creates variation in meiosis?
Crossing over and independent assortment
What is crossing over?
Exchange of DNA between homologous chromosomes
What is independent assortment?
Random separation of chromosome pairs
What happens at fertilisation?
Two haploid gametes fuse to form a diploid zygote
