My flat is beautiful and sunny. It has got five rooms. They are two bathrooms, a kitchen, a bedroom and a living room. The living room is big and cosy. There is a big TV, a sofa and two armchairs in it. My mum and I love sitting there watching TV.
My favourite room is a bedroom. It is smaller than the living room. But it is my favourite place because it is warm and comfortable. There is a bed and two cupboards. My bed is red. It looks like a real car. You can see a computer and a small TV in my bedroom. The room has got an aquarium.There are a lot of exotic fish in it. Every day I feed my fish and my mum helps me to clean my room. I like doing homework and playing in my room.
Дано: А-раннепспелость a-позднеспелость B-опушенность b-гладкость Найти:F1-? Решение: P.АABB(генотип именно гомозиготный доминантный,потому что в F1 получились все раннеспелые,опушенные,а это доминантный признак) * aabb(здесь генотип рецессивный по обоим парам признаков по изначальным данным) Г.AB ab F1.АаВb(гибриды первого поколения раннеспелые опушенные) P2.AaBb * aabb Г2.AB;Ab;aB;ab ab F2.AaBb(ран;опуш) Aabb(ран;глад) aaBb(позд;опуш) aabb(позд;глад) а)4 типа гамет б)150 в)25% или 464(aaBb) г)25% или 464(aabb) д)4 разных генотипа(AaBb;Aabb;aaBb;aabb)
My flat is beautiful and sunny. It has got five rooms. They are two bathrooms, a kitchen, a bedroom and a living room. The living room is big and cosy. There is a big TV, a sofa and two armchairs in it. My mum and I love sitting there watching TV.
My favourite room is a bedroom. It is smaller than the living room. But it is my favourite place because it is warm and comfortable. There is a bed and two cupboards. My bed is red. It looks like a real car. You can see a computer and a small TV in my bedroom. The room has got an aquarium.There are a lot of exotic fish in it. Every day I feed my fish and my mum helps me to clean my room. I like doing homework and playing in my room.
I like my flat!
А-раннепспелость
a-позднеспелость
B-опушенность
b-гладкость
Найти:F1-?
Решение:
P.АABB(генотип именно гомозиготный доминантный,потому что в F1 получились все раннеспелые,опушенные,а это доминантный признак) * aabb(здесь генотип рецессивный по обоим парам признаков по изначальным данным)
Г.AB ab
F1.АаВb(гибриды первого поколения раннеспелые опушенные)
P2.AaBb * aabb
Г2.AB;Ab;aB;ab ab
F2.AaBb(ран;опуш)
Aabb(ран;глад)
aaBb(позд;опуш)
aabb(позд;глад)
а)4 типа гамет
б)150
в)25% или 464(aaBb)
г)25% или 464(aabb)
д)4 разных генотипа(AaBb;Aabb;aaBb;aabb)