Đề kiểm tra: sinh học 9 – tiết 21 (thời gian: 45 phút)

PHÒNG GD&ĐT NÔNG CỐNG
TRƯỜNG THCS THĂNG BÌNH
ĐỀ KIỂM TRA: SINH HỌC 9 – TIẾT 21
(Thời gian: 45 phút)
ĐỀ A
 Họ và tên:	Lớp : 9..	
ĐIỂM
NHẬN XÉT CỦA THẦY - CÔ
 Đề bài
Câu 1: a. Cho một đoạn mạch của ARN có trình tự của các nuclêôtit như sau:
 – A – U – G – X – X – U – A – G – G –
o
Hãy xác định trình tự các nuclêôtit trong đoạn gen đã tổng hợp ra đoạn mạch ARN trên.
 b. Một gen có chiều dài 5100 A, trong đó số nuclêôtit loại T= 900. Tính số Nu mỗi loại của gen.
Câu 2: Nêu những điểm khác nhau giữa nhiễm sắc thể giới tính và nhiễm sắc thể thường?.
Câu 3: Ở đậu Hà lan, khi cho đậu Hà lan thân cao thuần chủng lai với đậu Hà Lan thân thấp thì thu được F1. Tiếp tục cho F1 tự thụ phấn thì thu được F2 có 335 cây thân cao : 115 cây thân thấp.
 a. Hãy biện luận và viết sơ đồ cho phép lai trên.
 b. Khi cho đậu Hà lan F1 lai phân tích thì thu được kết quả như thế nào ?
Bài làm
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PHÒNG GD&ĐT NÔNG CỐNG
TRƯỜNG THCS THĂNG BÌNH
ĐỀ KIỂM TRA: SINH HỌC 9 – TIẾT 21
(Thời gian: 45 phút)
ĐỀ B
 Họ và tên:	Lớp : 9..	
ĐIỂM
NHẬN XÉT CỦA THẦY - CÔ
Đề bài
Câu 1: a. Cho một đoạn mạch của ARN có trình tự của các nuclêôtit như sau:
 – U – A – G – G – X – A – U – G – X –
o
Hãy xác định trình tự các nuclêôtit trong đoạn gen đã tổng hợp ra đoạn mạch ARN trên.
 b. Một gen có chiều dài 6120 A, trong đó số nuclêôtit loại T= 700. Tính số Nu mỗi loại của gen.
Câu 2: Nêu những điểm khác nhau cơ bản giữa nguyên phân và giảm phân?.
Câu 3: Ở đậu Hà lan, khi cho đậu Hà lan hạt trơn thuần chủng lai với đậu Hà Lan hạt nhăn thì thu được F1. Tiếp tục cho F1 tự thụ phấn thì thu được F2 có 254 cây hạt trơn : 85 cây hạt nhăn.
 a. Hãy biện luận và viết sơ đồ cho phép lai trên.
 b. Khi cho đậu Hà lan F1 lai phân tích thì thu được kết quả như thế nào ?
Bài làm
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