Предмет: Биология, автор: Deith

Блакитноокий чоловік одружився на кароокій жінці, визначити генотип батьків і їх можливих дітей, та можливі варіанти кольору очей у гібридів першого покоління.

Ответы

Автор ответа: eaterinadm1009

А- карий цвет глаз

а - голубой цвет глаз

Генотип отца аа - рецессивная гомозигота, так как проявляется голубой цвет глаз

Генотип матери может быть АА или Аа - так как карий цвет - доминантный признак может подавлять голубой - рецессивный признак. Тогда возможно 2 варианта скрещиваний:

1) Р: АА х аа

G: А а

F1 : Аа - У всех потомков карий цвет глаз.

2) Р: Аа х аа

G: А а а

F1 : Аа, аа - 50% карие глаза и 50% голубые глаза

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THE ANGRY FAN

This happened in Australia, during a water-polo game that was one of the main sports events of the season. There was nothing exciting at the beginning of the game, but suddenly one of the players jumped out of the water and ran to the referee. He said that one of the forwards of the other team had bitten him in the leg while he was swimming under the water.

At first the referee thought that it was some kind of a joke, but when the player pointed to blood on his leg, he had to believe that it was serious. He called the forward and asked him why he had done such a strange thing; and though the forward insisted that he had not bitten anybody, the referee made him leave the game.

They began again, but a few minutes later, two players, one from each team, climbed out of the water, shouting that somebody had bitten them. There was blood on both players' legs. The game was stopped, and they began to let the water out of the pool. When almost all the water was let out, everybody saw a young crocodile at the bottom of the pool. Somebody had put the crocodile into the pool, but why? The truth became known when the players returned to their dressing room after the game and found a letter there.

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Завдання
1. Put "+" next to the true sentences and "" next to the false ones.

a) Water-polo is very popular in Australia

b) The players were very excited at the beginning of the game. c

) One of the players was bitten in the leg

d) d) It was a joke.

e) There was a crocodile at the bottom.

f) The crocodile was put in the pool in order to kill the best player of the opposite team.

II. Choose the correct answer.

1. How many water-polo players were bitten by the crocodile?

a) one

b) two

c) three

2. How was the crocodile found?

a) the water was let out of the pool

b) the players put the net into the pool

c) the water was let into the pool

3. Who put the crocodile into the swimming pool?

a) the referee

b) the player

c) the water polo fan

4. What did he do it for?

a) to play a joke

b) to make them move faster

c) to frighten them

5. When did they know the truth?

a) in the afternoon

b) when they returned to their dressing room

c) when they returned to the living room

6. Who could make them move faster?

a) a coach

b) a shark

c) a crocodile

III. Fill in the suitable words

At fast the 1. player pointed to 2. called the 4. thought that it was some kind of a joke? But when the on his leg? He had to 3. that it was serious. He and asked him why he had done such a strange thing; and though the forward insisted that he had not 5. him 6. anybody, the referee made

the game.

A) Leave

B) forward

C) bitten

D) referee

E) believe

F) blood

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