6.1.2 meiosis

Question 1

how do cells in the reproductive system divide and what do they produce

Answer 1

divide by meiosis and produce gametes

Question 2

what must be halted when gametes are formed

Answer 2

The number of chromosomes must be halved

Question 3

why must the number of chromosomes must be halved

Answer 3

otherwise there would be double amount of chromosomes after gamete meet with the zygote

Question 4

why do cells become genetically different

Answer 4

this is because the cells go from a diploid to a haploid

Question 5

what is the first stage of this

Answer 5

chromosomes lining up the middle

Question 6

what is the second thing of this

Answer 6

cells divide twice so that only one copy of each chromosome passes to each gamete

Question 7

how many haploid cells are produced in meiosis

Answer 7

4

Question 8

what Increases genetic variation of offspring

Answer 8

meiosis as it forms new combinations of maternal and paternal chromosomes every time a gamete is made

Question 9

what join at fertilisation to restore the normal number of chromosomes

Answer 9

gametes

Question 10

what happens when the male and female gametes fuse

Answer 10

it becomes a zygote with half of chromosomes from mum and half of chromosomes from dad

Question 11

what makes the cells keep dividing

Answer 11

mitosis makes cells divers from embryo

Question 12

what is the process of specialised cells called

Answer 12

differeation