Mitosis and Meiosis: Key Concepts and Processes

What is the total number of chromosomes in a human cell?

• 6 chromosomes

• 12 chromosomes

• 23 chromosomes

• 46 chromosomes

During which phase do sister chromatids separate?

• Prophase

• Telophase

• Metaphase

• Anaphase

Which structure is responsible for pulling sister chromatids apart?

• Nuclear membrane

• Centrosomes

• Kinetochore

• Microtubules

What is the purpose of meiosis in sexual reproduction?

• To repair damaged DNA

• To produce gametes with a half genome each

• To duplicate the DNA within the cell

• To create identical daughter cells

How are homologous chromosomes arranged during metaphase I of meiosis?

• Single file

• Side by side

• In pairs at opposite poles

• Randomly

What is the result of cytokinesis at the end of Telophase I in Meiosis?

• Formation of four new cells

• Formation of two new cells with the original chromosome number

• Formation of two new cells, each with half the original chromosome number

• No new cells are formed

During Meiosis II, what structures are separated during Anaphase II?

• Sister chromatids

• Daughter cells

• Homologous chromosomes

• Nuclei

What does crossing over in Prophase I result in?

• Decrease in chromosome number

• Exchange of genetic material between non-sister chromatids

• Separation of sister chromatids

• Duplication of genetic material

What is the significance of independent assortment in Meiosis?

• It ensures exact duplication of chromosomes

• It prevents genetic diversity

• It allows for the random assortment of chromosomes to gametes

• It aligns chromosomes in a single file

How does independent assortment contribute to genetic variation?

• By duplicating chromosomes

• By reducing the number of chromosomes in gametes

• By allowing different combinations of maternal and paternal chromosomes

• By sticking chromosomes together