IB Bio Meiosis

What is meiosis?

• Division of a diploid nucleus to form diploid nuclei

• Reduction division of a haploid nucleus to form diploid nuclei

• Reduction division of a diploid nucleus to form haploid nuclei

• Division of a haploid nucleus to form haploid nuclei

Which event occurs first during meiosis?

• centromere appearance

• chiasmata formation

• crossing over

• formation of bivalents

When are chromatids pulled towards the poles?

• Anaphase I

• Anaphase II

• Telophase I

• Telophase II

When do chromosomes uncoil to reform chromatin?

• Anaphase I

• Anaphase II

• Telophase I

• Telophase II

When are whole chromosomes pulled towards the poles?

• Anaphase I

• Anaphase II

• Telophase I

• Telophase II

Which of the following processes does NOT occur during Prophase I?

• Chromosomes condense

• Bivalents are formed

• Independent assortment

• Crossing over

When does the nucleolus disappear?

• Prophase I

• Metaphase I

• Anaphase I

• Telophase I

When are sister chromatids separated?

• Anaphase I

• Anaphase II

• Telophase I

• Telophase II

Which process breaks linkage groups?

• Separation of homologous chromosomes

• Separation of sister chromatids

• Independent assortment

• Crossing over

When does crossing over occur?

• Prophase I

• Prophase II

• Metaphase I

• Metaphase II