MeiosisIB MYP Biology: Flashcards
What these 14 flashcards ask
- What is meiosis?
- Where does meiosis happen in humans?
- How many chromosomes are in a human body cell?
- How many chromosomes are in a human gamete?
- What does haploid mean?
- What does diploid mean?
- How many divisions are there in meiosis?
- How many cells does meiosis make from one cell?
- How many cells does mitosis make from one cell?
- Are the cells made by mitosis identical or different?
- What is mitosis used for?
- How is the diploid number restored?
- Why do gametes need to be haploid?
- Name two ways that meiosis and fertilisation cause variation.
Exam questions on Meiosis
- A biology teacher in Mumbai tells her class that human body cells each contain 46 chromosomes, but the sex cells (gametes) that parents pass on are made by a special type of cell division.Distinguish between the terms haploid and diploid.2 marks
- A student in Toronto is making a revision table that compares cell division in the skin with cell division in the testes of a man. Skin cells divide to heal cuts, while cells in the testes divide to make sperm.Describe two differences, other than the number of cells made, between mitosis and meiosis.2 marks
- A cell in the testes of a man contains 46 chromosomes. This cell divides by meiosis to make sperm cells, and one of the sperm later fertilises an egg cell from his partner.State the number of chromosomes in each sperm cell made from this cell, and explain why gametes must have this number.3 marks
Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).