Cell division warm up

How do we grow?!!!

Cell division

Multiple Choice

How do organisms (bodies) grow?

• Cells grow in size

• Cells multiply in number

• Cells are not included in the process

• Building up muscles

How do organisms grow?

• Body cells divide many times to multiply in numbers.

• This division is called Mitosis, in which each cell divides into two identical cells.

• The body cell are called somatic cells (soma = body)

Multiple Choice

In your opinion somatic cells (body cells) contain....

• Just regular chromosomes

• Regular chromosomes along with sex chromosomes

• Just sex chromosomes

• There is nothing called sex chromosomes

Multiple Choice

Knowing that sex chromosome are found in all your cells, reproduction takes place by ...

• somatic cells

• sex cells (gametes)

• nothing called sex cells

If sex chromosomes are found in all your cells, SO,

What is the difference between somatic cells & sex cells (gametes)?

Somatic cells vs Gmates

• Somatic cells have 2 copies of each chromosome (Diploid)

• Gamete cells have 1 copy of each chromosome (Haploid).

• Ex) in humans somatic cells have 46 chromosomes, but gametes have 23 chromosomes.

Why gamete cells are haploid?

• Gamete cells are responsible for new individual formation.

• A new individual forms when a sperm unites with an egg.

• On haploid cell (n) + one haploid cell (n)= one diploid cell (2n)

• This way different species maintain their number of chromosomes over generations.

`How do gamete cells become haploid?!!

This is what we are going to know in the next episode ;)