user-avatar
lethuanthanh20
2 năm trước
Ở một loài thực vật gen A thân cao, a thân thấp, B quả tròn, b quả bầu dục hai cặp gen này nằm trên 2 cặp nhiễm sắc thể tương đồng khác nhau khi cho cây cao quả tròn tự thụ phấn với cao bầu dục thu được f1 gồm 2 7 1 cao tròn 270 bầu dục 90 thấp tròn 90 thấp bầu dục A)giải thích kết quả và viết sơ đồ lai từ P đến f1 B)chọn hai cây cao tròn ở f1 tính xác suất thu được hai cây đều dị hợp tử hai cặp gen quy định 2 tính trạng trên C) nếu cho 1 cây cao bồi tụ ở f1 tự thụ phấn thì kiểu gen phân li kiểu hình ở f2 như thế nào
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

III. Give the correct tense/ form of the verbs in the brackets. (1 pt) 1. He wishes he (be) a teacher . .....was.......................... 2. Lan (write) to Maryam for 3 months ...has writen.............................. 3. She (take) her children to the theatre last Sunday...... took............ 4. Water can't (find) here........................find........... IV. Supply the correct word form:1pt 1. Her clothes look very modern and.... (fashion)=>................fashionable..................................... 2. Many designers took ..... from Vietnam's ethnic. (inspire)=>........inspire....... 3. They have just.... a new style of jeans in the USA. (introduction)=>..........introducted.......... 4. Some designers have.... the Ao dai by printing lines of poetry on it. (modern)=>....moderned B. READING V. Chose to complete the sentences: 1pt William Shakespeare was an English play writer and a poet. He was born......(1)... April 23rd, 1564 in the small town of Stratford-upon-Avon, about 70 miles from London. He went to Stratford Grammar school when he ....(2) .a boy. At twenty one , he went to London and worked as an actor and a play writer. He also wrote many ..(3).... In 1613 Shakespeare left London and he returned to his native town of Stratford - upon –Avon. Three (4)... later, on April 23, 1616 he died there. 1. A in B. on C. at D. from 2. A. were B. was C . is D. be 3. A. poets B. poetry C . poems D. poetic 4. A. weeks B. years C. months D. days VI.Read the text, answer the questions below (1 pt) Hoa was born in Hue, but now she is living in Ha Noi with her aunt and uncle. She went to Ha Noi two years ago. Now she is studying at Quang Trung School. Yesterday was her thirteenth birthday. She had a small party with her friends. They ate a lot of food, fruits and cakes. In the evening Hoa had a stomachache. Her aunt was worried. She called a doctor. The doctor arrived and gave Hoa some medicine. She took the medicine and went to bed. Today Hoa feels better. 1. Where was Hoa born?.....she was born in hue.......................................................................... 2. When did she go to Ha Noi?.....she went to Hanoi two years ........................................................................... 3. Did they eat a lot of food, fruits and cakes?............................................yes, she did......... 4. Why did Hoa’s aunt call the doctor?............................because in the evening Hoa had a stomachache................................. C. Writing VII. Rewrite the following sentences so that the second sentence means the same as the first one. (1 pt) 1. Lan bought a new dress yesterday. => A new dress ......was bought by lan........................................................................................... 2. I last saw her 10 years ago. => I haven't .............................her for 10 years ................................................................... VIII. Use the words and phrases provided to make meaningful sentences. 1pt 1. Ba/ go/ Hanoi/ since yesterday morning => ............ba has gone to Hanoi since yesterday morning........................ 2. Nam and Ba/ play soccer/ two hours ago/ ? => ..........did nam and ba play soccer two hours ago?................... IX. (9A) Write a paragraph about why secondary should wear casualclothes at school (1pt) …………………………………………………………………………………………………… MN XEM GIẢI MIK GIẢI ĐÚNG CH NHA

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