1 cà chua hoa đỏ trội hoàn toàn so với hoa trắng. Cho cà chua thuần chủng hoa đỏ x hoa trắng ->F1. Cho F1 x F1 được F2. Viết sơ đồ lai từ P->F2. Xác định tỉ lệ kiểu gen, kiểu hình ở F2

1. I'm sorry. I can't read the instruction on the packet. ( I wish...)

2. Jean cloth/make/cotton/18th century

3. It's two years since I had a holiday

HTHT-QKD

1. This is a first time he went abroad

-> He hasn't

2. She started driving 1 month ago

-> She has

3. We began eating when it started to rain

-> we have

4. I last had my hair cut when I met her

-> I haven't

5. The last time she called me was 5 months ago

-> she hasn't

6. It is a long time since we last met

-> we haven't

7. This is the first time I had such a delicious meal

-> I haven't

8. I haven't seen him for 8 days

-> The last time

9. I haven't taken a bath since Monday

-> It is

Ở chó lông ngắn trội hoàn toàn so với lông dài. Cho chó lông ngắn thuần chủng giao phối với lông dài thu được F1. Cho F1 giao phối tại F2. Cho F1 lai phân tích thu được kết quả như thế nào?