Suvqalampir
|
48
|
46
|
24
|
24
|
Makkajo’xori
|
20
|
18
|
10
|
10
|
Olxo’ri
|
48
|
46
|
24
|
24
|
Bug’doy
|
14
|
12
|
7
|
7
|
Noxot
|
14
|
12
|
7
|
7
|
Xerbatsium g’o’za
|
26
|
24
|
13
|
13
|
Tog’olcha
|
8
|
6
|
4
|
4
|
Olcha
|
16
|
14
|
8
|
8
|
Tamaki avlodi
|
24,48,72
|
12,46,70
|
12,24,36
|
12,24,36
|
Xrizantema avlodi
|
18,36,90
|
16,34,88
|
9,18,45
|
9,18,45
|
O’SIMLIKLARDA XROMASOMALARNI NABORI
Gulli o’simliklarda xromasomalar nabori:
1-Markaziy hujayra=2 n
2-Saomatik hujayrasi= 2n
3-Murtak= 2n
4-Mikrospora= 1n
5-Spermiysi= 1 n
6-Tuxum hujayrasi= 1 n
7-Urug’ hujayrasi= 1 n
8- Urug’chi hujayrasi= 1n
9-Zigotasi= 2 n
10-Arxeosporasi= 2 n
11-Endosperim= 3 n
12- Birlamchi jinsiy hujayrada= 2 n
Mitoz sikli bosqichlarida xromasomalar nabori
Interfaza 3 bosqich
1)G1- sintezdan oldingi davr- 2n 2c
2) S- sintez davri (reduplikatsiya)- 2n 4 c
3) G2- sintezdan keying davr- 2 n 4 c
Mitoz 4 bosqichdan iborat:
1.Profaza- 2n 4c
2. Metafaza- 2n 4c
3. Anafaza 4n 4c
4. Telofaza 2n 2c
MEYOZ I
1.Profaza I- 2n 4c
2. Metafaza I- 2n 4c
3. Anafaza I 2n 4c
4. Telofaza I 1n 2c
MEYOZ II
1.Profaza II- 1n 2c
2. Metafaza II- 1n 2c
3. Anafaza II- 2n 2c
4. Telofaza II- 1n 1c
O’simliklarda endosperimidagi xromasomalarni aniqlash
O’simliklarda endosperimdagi xromasomalarni aniqlash uchun biz birinchi navbatda tuxum hujayradagi xromasomalarni sonini bilishimiz zarur.
Misol uchun makkajo’xori o’simligini olsak somatik hujayrasida 20 ta xromasoma mavjud tuxum hujayrasida esa, 10 ta xromasoma mavjud endosperimdagi xromasomalar sonini toppish uchun 10 x 3= 30 demak endoserimda 30 ta xromasoma mavjud ekan.
O’simliklarda urug’lanish jarayonida birlamchi jinsiy hujayralar 8 tani tashkil qiladi.
Qaydlar uchun
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