Please answer all thank you PRE-LAB NAME: Sporophyte (haploid or diploid?) Anthe
ID: 188346 • Letter: P
Question
Please answer all thank you
PRE-LAB NAME: Sporophyte (haploid or diploid?) Anthers contain microsporocytes, also known as microspore mother cells. haploid or diploid?) An ovary contains ovules. Each ovule contains a megasporocyte, also known as a megaspore mother cell (haploid or diploid?) mitosis or meiosis? mitosis or meiosis? m icrospores (haploid or diploid?) megaspores (haploid or diploid?) (how many megaspores survive per ovule: one, two, three or four?) mitosis or meiosis? mitosis or meiosis? immature male gametophyte "pollen grain" 2 cells: tube+generative (haploid or diploid?) female gametophyte -"embryo sac" 7 cells, 8 nuclei (haploid or diploid?) how many eggs in one embryo sac?) Which cell divides to produce two sperm cells? (tube cell orgenerative cell?) (by mitosis or meiosis?) Fertilization 1 sperm egg >>>zygote (haploid or diploid?) 1 sporm 2 polar nucloi ondosporm (haploid, diploid or triploid?) -"double fertilization"Explanation / Answer
Sporophyte = Diploid
Sporophyte undergoes meiosis to produce haploid microspores and haploid megaspores.
Microspores undergo mitosis to produce immature male gametophyte (pollen grain).
Only one megaspore survives out of four megaspores produced as a result of meiosis.
Tube cell and generative cell are haploid.
Generative cell divides (mitosis) to produce two sperm cells.
Megaspore undergoes mitosis to produce male gametophyte (Embryosac).
One embryosac contains one egg cell.
Double fertilization:
1 Haploid egg + 1 Haploid sperm cell = Diploid zygote
Two polar nuclei + 1 Haploid sperm cell = Triploid primary endosperm nucleus.