PATHOLOGY MCQ
GENETICS AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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3 long-stemmed plants:1 short-stemmed plant
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1 long-stemmed plant:1 short-stemmed plant
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1 long-stemmed plant:3 short-stemmed plants
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Long-stemmed plants only
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Detailed explanation-1: -A dominant allele is denoted by a capital letter (A versus a). Since each parent provides one allele, the possible combinations are: AA, Aa, and aa. Offspring whose genotype is either AA or Aa will have the dominant trait expressed phenotypically, while aa individuals express the recessive trait.
Detailed explanation-2: -Which of the following conclusions is best supported by the results of the breeding experiments? The completely-plated phenotype is controlled by a dominant allele of a single gene.
Detailed explanation-3: -This condition is inherited in an autosomal recessive pattern, which means both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.
Detailed explanation-4: -A man who is aware that he is a silent carrier of the FMO3 “fish odor syndrome” gene has children with a woman who is “normal.” Which statement would best explain how a child born from these parents could have fish odor syndrome? The mother is also a silent carrier of the defective FMO3 allele.