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Genes and Heredity
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A chart used to predict results of genetic crosses is ___.
a punnett square
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If G represents the dominant allele of a gene, then g would represent the ____.
recessive allele
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If a ___ allele is present, its trait will appear in the organism.
dominant
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What is probability?
the likelihood something will happen
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What are the physical characteristics that are studied in genetics called?
traits
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An organisms alleles is its ___.
genotype
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In this Punnett Square, which type of trait is homozygous?
recessive
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An organism who is the offspring of many generations of organisms with the same traits is called ___.
purebred
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In this Punnett Square, what percentage of organisms would be heterozygous dominant?
50%
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An organism whose family consists of generations of organisms with a variety of traits is called ___.
a hybrid
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An organism's physical appearance is its ___.
phenotype
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In this Punnett Square, what percentage of organisms would have green pea pods?
50%
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Why did Mendel use a paintbrush in his experiments with peas?
to control the fertilization of the plants
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In pea plants, green (G) is dominant. Yellow (g) is recessive. Why can a plant with yellow pods never be a hybrid?
A hybrid would have one dominant allele and one recessive (Gg). The dominant trait would show and the plant would be green, not yellow.
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In pea plants, the tall-stem allele and the short-stem allele are different forms of the same ___.
gene
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