user-avatar
1198978360465392
2 năm trước
Quan sát 1 tế bào sinh dục sơ khai đực ở kì đầu nguyên phân thấy có 12 NST kép.Tế bào này nguyên phân 5 lần rồi tất cả tế bào con đều tham gia giảm phân tạo tinh trùng.Xác định: a.Bộ NST 2n của loài.b.Số tế bào con dc tạo thành sau nguyên phân.c.Số NST môi trường cung cấp để tạo thành tế bào con.c.Số tinh trùng dc tạo thành.
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

1.What is the name of your favourite film? A. It's Casablanca. B. Her name is Louise Lane C. It's very nice. 2.Who does the film star? A. He's her cousin. B. The film was directed by Kenneth Branagh. C. It stars Chris Hemsworth. 3.What is the film about? A. It's about a poor nightclub dancer who changes places for a day with a rich prince. B. It stars Chris Rock as the nightclub dancer and Robin Williams as the prince. C. I think the film will be liked by many people. 4.What do you know about the main characters of the film? A. Thor is the main character. B. He's the crown prince of Asgard. C. Both A & B are correct. 5.How is the ending of the film? A. The film ends at 11 p.m. B. The film has a happy ending: they get married and have twins. C. I like every film that has a happy ending. 6.What do you think about the acting in the film? A. The acting is not very impressive. B. The special effects are excellent. C. I like the film because of the acting. 7.What do critics say about the film? A. A lot of critics praise the film for its visuals and music. B. Critics say it is worth watching. C. Both A & B are correct. 8.What do you think about the film? A. It's a very entertaining film. B. It attracts a lot of audiences. C. The film has been displayed in 23 countries.

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team