杂种优势的遗传理论有（）和（）学说。
题型：填空题
问题：
杂种优势的遗传理论有（）和（）学说。
题型：填空题
| 阅读理解。 | ||
| Good evening ladies and gentlemen. Welcome to the Richmond Film Society. Tonight, we begin a season of Marilyn Monroe films. Before we star the film I'd like to say just a few words about Marilyn Monroe's life. Marilyn was born in Los Angeles in 1926, but had quite a sad life as a child. Her father didn't want to see her from the time she was born and her mother became ill when she was very young and stayed in hospital for a long period of time. Between 1926 and 1935, Marilyn lived with lots of different families. In 1935, she went to a school for girls with no parents, but didn't like it and left in 1942 when she married Jim Dougherty. In 1949 she met the famous film director Johnny Hyde, and in 1950 she made her first film, The Asphalt Jungle. Between 1950 and 1961 she made thirty-one films. She was, however, never very happy. She died in Hollywood in 1962. | ||
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