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| 1 | |
Gregor Mendel studied the garden pea plants because |
| | A) | pea plants are small, easy to grow, grow quickly, and produce lots of flowers and seeds. |
| | B) | he knew about studies with the garden pea that had been done for hundreds of years, and wanted to continue them, using math - counting and recording differences. |
| | C) | he knew that there were many varieties available with distinctive characteristics. |
| | D) | all of the above. |
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| 2 | |
Mendel examined seven characteristics, such as flower color. He crossed plants with two different forms of a character (purple flowers and white flowers). In every case the first generation of offspring (F1) were |
| | A) | all purple flowers. |
| | B) | half purple flowers and half white flowers. |
| | C) | purple and white flowers. |
| | D) | all white flowers. |
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| 3 | |
Following question 2, above, if he then randomly mated the offspring of that first cross, or F1 generation, the offspring in the F2 generation were |
| | A) | all purple flowers. |
| | B) | half purple flowers and half white flowers. |
| | C) | purple and white flowers. |
| | D) | all white flowers. |
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| 4 | |
Mendel then studied his results, and proposed a set of hypotheses to explain them. The basis of these hypotheses is that parents transmit |
| | A) | traits directly to their offspring and they are expressed. |
| | B) | some factor, or information, about traits to their offspring and it may or may not be expressed. |
| | C) | some factor, or information, about traits to their offspring and it will always be expressed. |
| | D) | some factor, or information, about traits to their offspring and it is expressed in every generation, perhaps in a "blended" form with information from the other parent. |
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| 5 | |
A cross between two individuals results in a ratio of 9:3:3:1 for four possible phenotypes. This is an example of a |
| | A) | dihybrid cross. |
| | B) | monohybrid cross. |
| | C) | testcross. |
| | D) | none of these. |
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| 6 | |
Human height shows a continuous variation from the very short to the very tall. Height is most likely controlled by |
| | A) | epistatic genes. |
| | B) | environmental factors. |
| | C) | sex-linked genes. |
| | D) | multiple genes. |
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| 7 | |
In the human ABO blood grouping, the four basic blood types are type A, type B, type AB, and type O. The blood proteins A and B are |
| | A) | simple dominant and recessive traits. |
| | B) | incomplete dominant traits. |
| | C) | codominant traits. |
| | D) | sex-linked traits. |
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| 8 | |
What finding finally determined that genes were carried on chromosomes? |
| | A) | heat sensitivity of certain enzymes that determined coat color |
| | B) | sex-linked eye color in fruit flies |
| | C) | the finding of complete dominance |
| | D) | establishing pedigrees |
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| 9 | |
Nondisjunction |
| | A) | occurs when homologous chromosomes or sister chromatids fail to separate during meiosis. |
| | B) | may lead to Down syndrome. |
| | C) | results in aneuploidy. |
| | D) | All of the above. |
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| 10 | |
If parents are concerned about their risk of producing children with serious genetic defects |
| | A) | genetic infant design is now available. |
| | B) | genetic correction of defects is now available. |
| | C) | genetic modification of the parents is now available. |
| | D) | genetic screening and prenatal diagnosis is now available. |
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