Which of the following statements concerning the inheritance of a dominant trait (complete penetrance) is true? A. Every affected person must have at least one affected parent. B. The trait is observed to skip generations. C. The trait is passed along paternal lines. D. An affected heterozygote will transmit the allele to all of his or her offspring. E. Non-affected parents can have affected offspring.
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This is because a dominant trait only requires one copy of the allele to be expressed. Show more…
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Which of the following is not a characteristic of an autosomal dominant trait? A. The trait does not skip generations. B. The trait appears in equal numbers of males and females. C. Two unaffected parents can have an affected child. D. An unaffected parent and affected parent can have a 50% chance of having an affected child.
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Which of the following statements best describes autosomal recessive inheritance? A. Transmission can be from fathers to daughters and sons, or from mothers to daughters and sons; all affected individuals have at least one affected parent. B. The trait can disappear from a branch of the pedigree but reappear in later generations; there are approximately equal numbers of affected females and males. C. If a mother is a carrier of the trait she will appear unaffected; the trait may reappear in only her sons. D. A male with the trait passes it on to all his daughters and none of his sons; every affected person has a least one parent with the trait. E. None of the above describes this type of inheritance.
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A trait in which the heterozygotes have a phenotype that is intermediate between the dominant and recessive phenotypes is an indication of a. codominance. b. sex-linked trait. c. incomplete dominance. d. pleiotropy. e. None of these are correct.
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