microgametogenesis🏰🧁

Question 1

male gametophyte

Answer 1

microspore/pollen grain

Question 2

PRE POLLINATION DEVELOPMENT

at first,pollen g nucleus divides by

Answer 2

uneuqal mitosis

Question 3

small nucleus +nt near the wall is

Answer 3

generative nucleus

Question 4

large irregular nuleus +nt inside cytoplsasm

Answer 4

tube nucleus or vegetative n.

Question 5

when pollen g is mature it contains

Answer 5

2 cells

Question 6

generative cell changed into

Answer 6

vermiform / spindle shaped structure w/ dense cytoplasm and now detaches to float in the cytoplasm of vegetative nucleus

Question 7

in over 60%angiosperms pollen g are shed at

Answer 7

2 cellled stage then after tht inside polen tube gen. cell divides mitotically t form 2 non motile male gametes—————–in capsella

Question 8

in remaining species the gen. nuclleus divides mitotically to form

Answer 8

2 nonmotile male gametes; 3 celled species

Question 9

POST POLLINATION DEVELOPMENT

firstly ___ enters the pollen t and takes ___ position.then enters the gen. nucleuss

Answer 9

veg. nucleus ; terminal

Question 10

male gametophyte of angio. is highly reduced

Answer 10

n is comletely depended on sporophyte

Question 11

for formn of a mature pollen g from mmc or pmc divisions?

Answer 11

1 mieotic and 1 mtotic divisions

Question 12

for formation of a mature male gameophyte div.?

Answer 12

1 meiosis and 2 mitosis