Mitosis And Meiosis And Sex Chromosomes

Question 1

Mitosis

Answer 1

Mitosis is cell division used by normal cells in body e.g skin cells
Single cell divides into two identical daughter cells each with 46 chromosomes (same as parent cell)

Question 2

Meiosis

Answer 2

Formation of egg or sperm cell

Cell with 46 chromosomes divides twice, resulting in 4 daughter cells each with only 23 chromosomes

Question 3

The 23rd pair of chromosomes in a zygote determine..

Answer 3

22 pairs of non sex chromosomes and 1 pair of sex chromosomes
(23 pairs in total = 46)
Female = xx Male=xy