1. Chapter 5. Sexual reproduction
Recap Question 17 – 21 (in class) Homework Understand what mitosis And meiosis means
Next Lessons
Meiosis
Plant reproduction
Bricks Biology Volume 1 Chapter 5 Plants.

2. Chromosomes
We said we get half of the genes from mother and half from fathers. What does this mean?
Chromosomes.

4. Keywords Cell division - Meiosis Gametes ( sex cells) - Mitosis Zygote
Haploid (1n)
Diploid (2n)
Chromosomes

5. Cell division Cell division Mitosis = Diploid (2n) =
Meiosis: produces cells which have half the usual number of chromosomes.
Mitosis: makes a new set of chromomes so that each new cell gets its own exact copy of the information.
Cell division
Mitosis =
The haploid number is the number of chromosomes within thenucleus of a cell that constitutes one complete chromosomal set. 
A diploid cell is a cell that contains two sets of chromosomes.
The diploid number of a cell is the number of chromosomes in the cell. This number is commonly abbreviated as 2n, where n stands for the number of chromosomes. For humans this equation would be 2n=46. Humans have 2 sets of 23 chromosomes for a total of 46 chromosomes:
Diploid (2n) =
In Humans 2n = 2x23 = 46)

6. Meiosis: produces cells which have half the usual number of chromosomes.
Haploid (n) =
Our sex cells (sperm and eggs) are haploid cells that are produced by meiosis.
In Humans sex cells (n = 1x23 = 23)

7. 46 23 46