Viết câu nói sau đây dưới dạng ký hiệu: a.Cho giống lúa hạt dài thuần chủng lai với hạt tròn thuần chủng, F1 thu được 100% hạt tròn.  Cho các cây F1 lai với lúa hạt dài thu được đời con với tỉ lệ 308 hạt tròn : 303 hạt dài. b.Cho chuột bố mẹ lông ngắn lai với lông ngắn, đời con F1 thu được với tỉ lệ 3 lông ngắn : 1 lông dài. Cho đời con F1 lông dài lai với chuột lông dài, thu được đời con toàn lông dài.

Các câu hỏi liên quan

Ex 1: Chuyển các câu sau sang dạng câu khẳng định (+) phủ định (-) và câu hỏi (?) 1. My sister wants to study with me (-)………………………………………………………………………………… (?)………………………………………………………………………………… 2. My sisters want to study with me (-)………………………………………………………………………………… (?)………………………………………………………………………………… 3. She always tells me about her classmate (-)………………………………………………………………………………… (?)………………………………………………………………………………… 4. Does she make a mistake? (-)………………………………………………………………………………… (+)………………………………………………………………………………… 5. He drank too much beer (-)………………………………………………………………………………… (+)………………………………………………………………………………… 6. They are students? (-)………………………………………………………………………………… (+)………………………………………………………………………………… 7. She should share her room with her sister (-)………………………………………………………………………………… (+)………………………………………………………………………………… 8. They are cooking in the kitchen (-)………………………………………………………………………………… (+)………………………………………………………………………………… 9. I have met her 5 times (-)………………………………………………………………………………… (+)………………………………………………………………………………… EX 2: Viết lại câu sao cho giữ nguyên nghĩa 1. I don’t have a TV in my room. => There……………………………………………………………………………………… 2. The chair is in front of table. => The table ………………………………………………………………………………….. 3. My favorite room in the house is the kitchen. => I like………………………………………………………………………………………… 4. A bike is cheaper than a car. => a car………………………………………………………………………………………… 5. Nobody is taller than my brother in my family => My brother is ………………………………….……………………………………………….. 6. Nam is the best at English in his class. => Nobody ………………………………………………………………………….………… 7. My family has a cat. 8. => There…………………………………………………………….………… 9. No one is more beautiful than Lan in my class…………………………………………………. 10. He was lazy, so he got a bad mark. => ( because)…………………………………………………………………………………….. 11. It rained hard yesterday. I went to school on time. => (although)……………………………………………………………………………………… 12. Why don’t we go to the beach for a change? => How about ……………………