weeanphamx

1 năm trước

Bài 1: Ở cà chua, gen A quy định quả màu đỏ trội hoàn toàn với gen a quy định quả màu vàng. Gen B quy định quả tròn trội hoàn toàn với gen b quy định quả bầu dục. Các gen này phân li độc lập trên NST thường. Cho biết có bao nhiêu kiểu gen của P để F1 thu được các tỉ lệ phân li KH sau. a) Thu được 2 loại KH với TLPL 3:1 b) Thu được 4 loại KH

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Dương Park Bo

1 năm trước

a) +) P. (đỏ) Aa x Aa (đỏ)

Gp. A:a A:a

F1. AA : 2Aa : aa (3:1)

+) P. (tròn) Bb x Bb (tròn)

Gp. B:b B:b

F1. BB : 2Bb : bb (3:1)

P. (đỏ, tròn) AaBb x AaBb (vàng, bầu dục)

Gp. AB:Ab:aB:ab AB:Ab:aB:ab

F1.

- 9 đỏ, tròn: 1 AABB ; 2 AABb ; 2 AaBB ; 4 AaBb

- 3 đỏ, bầu dục: 1 Aabb ; 2 AAbb

- 3 vàng, tròn: 1 aaBB ; 2 aaBb

- 1 vàng, bầu dục: 1 aabb

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if you don't wear a helmet , you can't ride your bike => Unless

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.

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if you don't wear a helmet , you can't ride your bike => Unless

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.