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2. Ulotriksni jinsiy ko`payishida 128 ta
gameta hosil bo`lgan bo`lsa shu gametaning
50% dan zigota hosil bo`lgan zigotaning
25% dan ulotriks iplari hosil bo`ldi.
Qancha
ulotriks iplari hosil bo`lgan?
A)64
B)32
C)128 D)16
Yechimi
2 ta gametadan 1 ta zigota hosl boladi
1 ta zigotadan 4 ta ulotriks ipi hosil bo`ladi
128 ta gametadan 128 /2 = 64 ta zigota
hosil bo`lishi kerak edi, lekin 25% dan zigota
hosil bo`lgan
64 --- 100 %
X ---- 25 % x = 16 ta zigota
32 ta zigotaning 50 % da nip hosil bo`ldi
16 ------ 100 %
X -------- 50 % x= 8
Bitta zigota 4 ta ulotriks ipi hosil qiladi
8 x 4 = 32 ta ip hosil bo`ladi
Javob: B
3. Ulotriksni jinsiy ko`payishida 512 ta
gameta hosil bo`lgan bo`lsa shu gametaning
25% dan zigota hosil bo`lgan zigotaning
50% dan ulotriks iplari hosil bo`ldi. Qancha
ulotriks iplari hosil bo`lgan?
A)64
B)128
C)32 D)16
Yechimi
2 ta gametadan 1 ta zigota hosl boladi
1 ta zigotadan 4 ta ulotriks ipi hosil bo`ladi
256 ta gametadan 512 /2 = 256 ta zigota
hosil bo`lishi kerak edi, lekin 25% dan zigota
hosil bo`lgan
256 --- 100 %
X ---- 25 % x = 64 ta zigota
32 ta zigotaning 50 % da nip hosil bo`ldi
64 ------ 100 %
X -------- 50 % x= 32
Bitta zigota 4 ta ulotriks ipi hosil qiladi
32 x 4 = 128 ta ip hosil bo`ladi
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