Wednesday Science Bellringer 1.22

Why do we need meiosis?

• To double the number of chromosomes going into sex cells
• To halve the number of chromosomes going into sex cells
• To triple the number of chromosomes going into sex cells
• To not change the number of chromosomes going into sex cells

Tags

NGSS.HS-LS3-2

Fruit fly body cells have 8 chromosomes. After mitosis, you would expect a resulting fruit fly daughter cell to have -

• 16 chromosomes.
• 46 chromosomes.
• 8 chromosomes.
• 4 chromosomes.

Tags

NGSS.HS-LS1-4

The distribution of chromosomes in one type of cell division is shown in the diagram below.

Which process is represented in the diagram?

• asexual reproduction

• meiosis

• mitosis

• vegetative propogation

Tags

NGSS.HS-LS1-4

Mitosis is useful for the creation of new cells which is important for all of the following EXCEPT

• organism growth.

• repair of damage.

• replacement of worn out cells.

• production of gametes

Tags

NGSS.HS-LS1-4

During mitosis the parent cell produces:

• 2 daughter cells with the same number of chromosomes as the parent cell.

• 2 daughter cells with the half the number of chromosomes as the parents cell.

• 4 daughter cells with the same number of chromosomes as the parent cell.

• 4 daughter cells with half the number of chromosomes as the parent cell.

Tags

NGSS.HS-LS1-4

During meiosis the parent cell produces:

• 2 daughter cells with the same number of chromosomes as the parent cell.

• 2 daughter cells with the half the number of chromosomes as the parents cell.

• 4 daughter cells with the same number of chromosomes as the parent cell.

• 4 daughter cells with half the number of chromosomes as the parent cell.

Why would it be important to replicate DNA before a cell divides in mitosis or meiosis?

• In order for genetic information to be transferred into daughter cells.
• In order for the cell to be able to increase in size.
• In order for the DNA to be contained in the nucleus.
• In order for the cell to re-order the DNA sequencing in the new cells.

Tags

NGSS.HS-LS1-4

Meiosis produces different types of cells than mitosis. If there was a "meiosis club," all of these cells could be included EXCEPT
(Which cell type is not produced in meiosis?)

• gametes
• body cells
• sperm cells
• egg cells

Tags

NGSS.MS-LS3-2

In meiosis, crossing over occurs in prophase 1. What is the significance of this event?

• This process ensures that chromosomes are evenly divided into daughter cells.
• This process can lead to genetic variation in daughter cells.
• This process can create gaps in the chromosome DNA for RNA to bind.
• This process allows for spindles to connect to the chromosomes in order to pull chromosomes apart.

Tags

NGSS.HS-LS3-2

In meiosis, the four resulting cells are 

• identical to the starting cell and different from each other.
• different from the starting cell and different from each other. 
• identical to the starting cell and identical to each other.
• different from the starting cell and identical to each other.

Tags

NGSS.HS-LS3-2