Ha Hi

[ GẤP ] 1 n nst kép có bằng 2n nst đơn không? Vì sao?

Xem đáp án

2 câu trả lời

nguyenvuong322

Đáp án: Đơn bội là n, Lưỡng là 2n, tam bội 3n, tứ bội là 4n......, 3n 4n thì thuộc đột biến gen còn 2n hay n thì binh thường. NST đơn hay NST kép thì là chuyện khác! Ở Thể đơn bội thì ta có n đơn, n kép, lưỡng bội là 2n đơn 2n kép,, đơn hay kép là do nó nằm trong quá trính nào nguyên phân hay giảm phân. Không phải cứ n là đơn 2n là kép

Giải thích các bước giải:

nguyenthuyen121192

2 năm trước

Đáp án:

Tính về số NST đơn thì bằng nhau em nhé

Nhưng về số NST thì không bằng nhau, bản chất của n NST kép là có n NST, mỗi NST có 2 crômatit còn 2n NST đơn là có 2n NST riêng biệt

Đăng nhập để trả lời

Câu hỏi trong lớp Xem thêm

V. Read the text then choose the best options to complete the statements. (1.0pt) Yesterday, on the way home from school, I saw an accident. A boy was run over by a taxi when he was riding his bicycle. The boy's leg was broken and it was bleeding badly. Someone there tried to stop the bleeding. They put pressure on it and held it tight. A man used his mobile phone to call the emergency service. Some minutes later, an ambulance arrived and sent the boy to the hospital. Two policemen came to the scene immediately. Some people told the police that the taxi was driving at a very high speed when the accident happened. Some others began talking about the traffic accidents these days andblamed the increasing number of accidents on the roads for careless driving and drunk drivers. 1. What did the writer see yesterday? A. a fire B. an accident C. a fighting D. a crash 2. The boy was sent to the hospital by. A. a police 3. What partof his body was hurt?- His. B. a car C. an ambulance D. a taxi A. arm B. leg C. head D. shoulder 4. How was the driver driving when the accident happened?- Very.. A. slowly C. carefully B.well D. fast

2 lượt xem

2 đáp án

22 giờ trước

Nước ta có bao nhiêu dân tộc?

1 lượt xem

2 đáp án

22 giờ trước

Exercise 2: Giovanni lives in Italy and plans to visit England. Make all the changes and additions necessary to produce, from the following eight sets of words and phrases, eight sentences which together make the letter Giovanni wishes to send to the college where he hopes to study English. Dear Mr. Johnson, 1. A friend/mine/recently/return/England/advise me/write/you. 2. I/hope/come/England/next year/spend/some months/Cambridge. 3. Perhaps/recommend/suitable English family/me stay. 4. While/I/there/take/part – time course/improve/my English. 5. Be/part – time course/your college? 6. If/be/I/be/grateful/you send/application form. 7. Please/tell/much/fees/course/be. 8. I/like/know/date/course/begin. Your sincerely Giovanni Bianchi

2 lượt xem

1 đáp án

22 giờ trước

Tìm lỗi sai, giải thích và sửa: The exercise corrects by the teacher every day.

3 lượt xem

2 đáp án

22 giờ trước

Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

326

326 lượt xem

1 đáp án

1 năm trước

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

239

239 lượt xem

1 đáp án

1 năm trước

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

237

237 lượt xem

1 đáp án

1 năm trước

[ GẤP ] 1 n nst kép có bằng 2n nst đơn không? Vì sao?

2 câu trả lời

Nước ta có bao nhiêu dân tộc?

Tìm lỗi sai, giải thích và sửa: The exercise corrects by the teacher every day.

Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

Đề thi - đề kiểm tra Xem thêm

Chúng tôi

Học tốt

Liên kết

Mạng xã hội

[ GẤP ] 1 n nst kép có bằng 2n nst đơn không? Vì sao?

2 câu trả lời

Nước ta có bao nhiêu dân tộc?

Tìm lỗi sai, giải thích và sửa: The exercise corrects by the teacher every day.

Choose the best answer.I think you should buy _____ pack of mineral water instead. And you can also buy _____ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______ cookies and soft candies.

Choose the best answer.We should decorate our living room with _____ orange banner. We also need ________ ribbons, balloons, party hats and costume.

Choose the best answer.I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

Đề thi - đề kiểm tra Xem thêm

Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.