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).

A．drove B．sent C．forced D．had

A．few B．a few C．many D．a lot

A．anxious B．crazy C．hungry D．straight

A．plates B．dining-rooms C．dorms D．lunches

A．lasted B．stuck C．started D．continued

A．village B．hometown C．temple D．school

A．researches B．surveys C．observations D．experiments

A．passed B．gave C．offered D．hid

A．noticed B．discovered C．declared D．prove

A．agreed B．meant C．announced D．informed

A．Thus B．Instead C．Despite D．Yet

A．strange B．fine C．short D．cool

A．showed up B．stood out C．set aside D．turned on

A．parents B．students C．children D．monks

A．seldom B．sometimes C．actually D．mainly

A．compare B．share C．satisfy D．cooperate

A．concerned with B．worried about C．trusted in D．cared about

A．However B．Though C．Finally D．Regardless

A．how B．what C．where D．which

A．possible B．obvious C．able D．likely