In 1822 Gregor Mendal was born on a farm in Austria. His father found that Mendal was interested in plants. He knew that his son was clever, and he Mendal to high school. At that time people attended high school. However, since his father could not give him enough money, he always went . Luckily, the other students always gave him food from their Later, Mendal became a monk(修道士)and his studies. He took care of the gardens at the where he and the other monks lived, and he did with pea plants for eight years. He wanted to prove that parents features to their children. Around 1860, Mendal that plants have recessive and dominant(显性的) genes.
He grew a tall pea plant with a short pea plant. Every one of the first generation of four pea plants was tall. This that tall was the dominate gene. in the next generation of four pea plants, one plant was very . The recessive short genes it received from both of its parents had made it short.
From these experiments, he understood that dominant genes the most often in the . Recessive genes only appeared and only when both parents carried the genes for the features.
To his finding with others, he wrote a paper. But during his lifetime, no one what he had discovered. At the time of his death, he still felt very sad.
, his important discovery was accepted in 1990. We now know that both plants and animals have genes and that genes play a major role in we look, how we act, and whether or not we are to get certain diseases. Today we honor Mendal as Father of hereditizm(遗传学).
1.A. drove B. sent C. forced D. had
2.A. few B. a few C. many D. a lot
3.A. anxious B. crazy C. hungry D. straight
4.A. plates B. dining-rooms C. dorms D. lunches
5.A. lasted B. stuck C. started D. continued
6.A. village B. hometown C. temple D. school
7.A. researches B. surveys C. observations D. experiments
8.A. passed B. gave C. offered D. hid
9.A. noticed B. discovered C. declared D. prove
10.A. agreed B. meant C. announced D. informed
11.A. Thus B. Instead C. Despite D. Yet
12.A. strange B. fine C. short D. cool
13.A. showed up B. stood out C. set aside D. turned on
14.A. parents B. students C. children D. monks
15.A. seldom B. sometimes C. actually D. mainly
16.A. compare B. share C. satisfy D. cooperate
17.A. concerned with B. worried about C. trusted in D. cared about
18.A. However B. Though C. Finally D. Regardless
19.A. how B. what C. where D. which
20.A. possible B. obvious C. able D. likely
the instructions on the packet when you take the drug and the drug, I think, will work soon.
A. Follow B. To follow
C. Following D. Followed
— What is the man, actually?
—I don’t know for sure. But I think he can be _______ but a policeman.
A. nothing B. something
C. everything D. anything
Tom’s little sister is a girl of great _______. She takes an interest in everything.
A. ambition B. caution
C. curiosity D. strength
— Why do we get up so early?
— If we _______ the flight we would have to stay here for another day.
A. miss B. would miss
C. missed D. had missed
A notice was ________ in order to remind the students of the changed lecture time.
A.sent up B.given up
C.set up D.put up
