BIOL 110 Chapter Tutorial 16: The Expression of Multiple Alleles and Pedigree Analysis
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Tutorial 16: the expression of multiple alleles and pedigree analysis. Incomplete dominance: complete dominance: the dominant trait is completely expressed and the recessive trait is not expressed at all in the phenotype a heterozygous individual. Incomplete dominance: the phenotype of a heterozygous individual is an intermediate between the dominant and recessive trait: in incomplete dominance and codominance, traits are expressed as follows, xyxy: x represents character, y superscript represents one trait. F2 generation: 1:2:1 ratio; 1 xyxy, 2 xyxz, 1 xzxz. Xz: codominance: both alleles are expressed fully and separately in a heterozygous individual. All blood types are possible type a can be iaia, iai; type b can be ibib, ibi. What are the possible blood types of the offspring of a type ab and type o. Only type a and type b are possible. One dominant allele and one recessive allele is expressed in every case.
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According to the multiplication rule of probability, the chance of crossing two pea plants that are heterozygous for height and have none of four offspring showing the recessive short phenotype is:A. ¼ à ¼ à ¼ à ¼. B. ¾ à ¾ à ¾ à ¾. C. (¼ à ¼ à ¼ à ¼) + (¾ à ¾ à ¾ à ¾). D. ¼ + ¼ + ¼ + ¼. E. None of the above. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Females inherit X-linked traits from their maternal parent only. | ||
Females can inherit a gene for an X-linked trait from either parent. | ||
Males inherit X-linked traits from their paternal parent only. | ||
Males can inherit a gene for an X-linked trait from either parent but normally inherit it from their fathers. |
Males can inherit a gene for an X-linked trait from either parent but normally inherit it from their fathers. |