Test Grammar англійська мова 1) He... around the town for half an hour a) has driven b) has been driving. 2) I an eassay a) have already written b)already have written. 3) Andy... her yet a)hasn't phoned b)hasn't been phoned. 4)Sam...at six in the morning a) often wakes up b) has often waken up. 5)You...To Bristol tommorow a) are flying b) fly. 6)You look tired.You... to much a)have worked b) have been working. 7)He his camera a) has sold b) sold 8)The train... at five o'clock a) departs b) is departing. 9)Emma...the letters since ten o'clock a)has written b) has been writting. 10)The leaves from trees...in autumn a) fall down b) are falling down
? Test Grammar англійська мова 1) He... around the town for half an hour a) has driven b) has been driving. 2) I an eassay a) have already written b)already have written. 3) Andy... her yet a)hasn't phoned b)hasn't been phoned. 4)Sam...at six in the morning a) often wakes up b) has often waken up. 5)You...To Bristol tommorow a) are flying b) fly. 6)You look tired.You... to much a)have worked b) have been working. 7)He his camera a) has sold b) sold 8)The train... at five o'clock a) departs b) is departing. 9)Emma...the letters since ten o'clock a)has written b) has been writting. 10)The leaves from trees...in autumn a) fall down b) are falling down
?
G А а
F Аа-зеленые
2) Скрещиваем F1 между собой и получаем F2
Аа х Аа
G А а А а
F АА 2Аа аа
АА-25%
Аа-50%,так как стоит коэффициент 2
аа-25%
Всего:Желтых-25%,Зеленых-75%
Вопросы:
1)1 тип гамет-А
2)2:желтый и зеленый
3)так как зеленых арбузов получилось в F2-75%,мы можем составить пропорцию
75%-х
100%-388(кол-во гибридов в F2 поколении)
75*388=100х
29100=100х
х=291-зеленых арбузов.
4) зная сколько всего гибридов в F2,и зная,что всего гетерозиготных особей 50%,мы снова можем составить пропорцию:
50%-х
100%-388
50*388=100х
х=194-гетерозиготных особей
5) генотипов разных получилось 3: АА,Аа,аа:)