What is the role of meiosis in reproduction?
It is a type of cell division involved in producing gametes.
AQA GCSE Combined Science: Trilogy (8464) — Biology — Foundation · 4.6.1.2
Revise AQA GCSE Combined Science: Trilogy (8464) — Biology — Foundation specification point 4.6.1.2, Meiosis, with free active-recall flashcards. Flip through the set or review every question and answer below.
1 / 10
What is the role of meiosis in reproduction?
It is a type of cell division involved in producing gametes.
Why is meiosis called a reduction division?
It halves the chromosome number: a diploid cell with two sets of chromosomes produces haploid cells with one set.
How do cells produced by meiosis compare genetically with one another and with the original cell?
They are genetically different from one another and are not identical copies of the original cell.
How many sets of chromosomes does a gamete nucleus contain?
One set; the nucleus is haploid.
What chromosome sets does a zygote nucleus contain after two gamete nuclei fuse?
Two sets, one from each gamete; the nucleus is diploid.
What is the significance of the change from haploid gametes to a diploid zygote?
It maintains the species’ chromosome number across generations.
What is mitosis?
Nuclear division that gives rise to genetically identical daughter cells.
What happens to chromosomes before mitosis?
They are replicated exactly.
How does mitosis distribute replicated chromosomes between daughter cells?
Chromosome copies separate, so each daughter cell receives the same genetic information and chromosome number is maintained.
What four processes does mitosis enable?
Growth, repair of damaged tissues, replacement of cells, and asexual reproduction.