9 - Mitosis in Onion Root Tip Cells - Sept 29

What is the purpose of DNA replication during cell division?

• To produce new chromosomes

• To separate the sister chromatids

• To ensure each daughter cell receives a copy of each chromosome

• To form the cell plate

Tags

NGSS.HS-LS1-4

Which stage of mitosis involves the supercoiling of chromosomes and the formation of spindle fibers?

• Prophase

• Prometaphase

• Metaphase

• Anaphase

Tags

NGSS.HS-LS1-4

Which is the best description for telophase?

• The chromosomes come to rest along the center plane of the cell

• The centromeres split and the sister chromatids migrate toward the opposite poles of the cell

• The chromosomes at either end of the cell cluster together and a new nuclear membrane forms

• The cytoplasm divides and two separate cells are formed

Tags

NGSS.HS-LS1-4

Why are onion roots used for viewing mitosis?

• They have a large number of chromosomes

• They have easily observable cells

• They have actively dividing cells at the meristem

• They have stained chromosomes

Which region of an onion root tip contains cells that cover and protect the underlying growth region?

• Root cap

• Region of cell division

• Region of cell elongation

• Meristem

What is the purpose of staining chromosomes in onion root tip squash?

• To make the chromosomes more easily observable

• To separate the sister chromatids

• To facilitate the formation of a new nuclear membrane

• To identify the formation of the cell plate

Tags

NGSS.HS-LS1-4

Which stage of mitosis involves the chromosomes coming to rest along the center plane of the cell?

• Prophase

• Prometaphase

• Metaphase

• Anaphase

What happens during anaphase?

• The chromosomes come to rest along the center plane of the cell

• The centromeres split and the sister chromatids migrate toward the opposite poles of the cell

• The chromosomes at either end of the cell cluster together and a new nuclear membrane forms

• The cytoplasm divides and two separate cells are formed

What is the purpose of the cell plate in telophase in plant cells?

• To produce new chromosomes

• To separate the sister chromatids

• To ensure each daughter cell receives a copy of each chromosome

• To form the new cell wall between the two cells

What occurs at the region of cell elongation in an onion root tip?

• protection of the underlying growth region

• actively divide cells

• cells increasing in size

• the formation of a new nuclear membrane