meiosis

Question 1

what si sexual reproduction

Answer 1

involves production of gametes by meiosis
gametes fuse to form a zygote
zygote is unique

Question 2

what are gametes

Answer 2

sex cells

haploid

Question 3

what is meiosis

Answer 3

cell division in formation of gametes (non identical haploids)

Question 4

what must occur prior meiosis

Answer 4

interpahse- copies pf genetic information are made

Question 5

what happens during the first stage of meiosis

Answer 5

chromosomes pairs line up along the equator
chromosomes are separated and move to oppsoite poles of the cell (the side it pulled to is random= variation)
chromosome number is halved

Question 6

what happens during the seconnd stage of meiosis

Answer 6

chromosomes line up along cell equator
seperated and move to opposite polls or cells
4 unique haploid gametes are produced

Question 7

why is meiosis important for sexual reproduction

Answer 7

increases genetic variation

insures zygote is diploid

Question 8

what is fertilisation

Answer 8

gametes nucleus fuse togther restoring the number of chromosomes
new cell divides by mitosis

Question 9

what is a chromosome

Answer 9

a long coiled molecule of DNA that carries genetic information in the form of genes

Question 10

define gene

Answer 10

a small section of DNA that codes for a sequence of amino acids to form a protein