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| Gregor Mendel used pea plants to study | the inheritance of traits
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| Offspring that result from crosses between true-breeding parents with different traits | are called hybrids
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| Gregor Mendel concluded that traits are | inherited through the passing of factors from parents to offspring
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| When Gregor Mendel crossed a tall plant with a short plant, the F1 plants inherited | an allele for tallness from the tall parent and an allele for shortness from the short parent
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| The principle pf dominance states that | some alleles are dominant and others are recessive
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| When Gregor Mendel crossed true-breeding tall plants with true-breeding short plants, all of the offspring were tall because | the allele for tall plants is dominany
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| The principles of probability can be used to | predict the traits of the offspring produced by genetic crosses
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| Organisms that have two identical alleles for a particular trait are said to be | homozygous
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| If you made a Punnett square showing Gregor Mendel's cross between true-breeding tall plants and true-breeding short plants, the square would show that the offspring had | a genotype that was different from that of both parents
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| How many different allele combinations would be found in the gametes produced by the pea plant whose genotype was RrYY | 2
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| Situations in which one of the allele for a gene is not completely dominant over another allele for that gene are called | incomplete dominance
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| Gregor Mendel's principles of genetics apply to | all organisms
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| The chemical factors that determine traits are | genes
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| A tall plant is crossed with a short plant. If the tall F1 pea plants are allowed to self-pollinate, | some of the offspring will be tall and some will be short
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| A cross of red cow (RR) with a white bull (WW) produces all roan offspring(RW). This type of inheritance is known as | incomplete dominance
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| An organism with a dominant allele for a particular form of a trait will SOMETIMES show that trait | False
always
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| The different forms of a gene are called | alleles
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| If the allele for shortness in pea plants were dominant, all the pea plants in Mendel's F1 generation would have been | short
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| How many recessive alleles for a trait must an organism inherit in order to show that trait? | 2
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