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TLS Online TPP Program
#Question id: 12176
#Unit 8. Inheritance Biology
In a Z-linked characteristic, Cameo plumage, which produces brown feathers, while the wild-type plumage is a glossy metallic blue. If a pure blue-colored male is crossed with a cameo female, then what will be the probability of blue and cameo plumage of male and female in F2 phenotype?
TLS Online TPP Program
#Question id: 12487
#Unit 8. Inheritance Biology
Neurofibromatosis type 1 is one of the most common autosomal dominant disorders. A woman with neurofibromatosis type 1 has an unaffected partner. Which of the following is correct regarding their children?
TLS Online TPP Program
#Question id: 12488
#Unit 8. Inheritance Biology
Retinoblastoma usually occurs as a sporadic event but in around 10% of cases there is a positive family history due to autosomal dominant inheritance. In these families the penetrance is approximately 80% (= 0.8). A woman with retinoblastoma, whose father and grandfather were also affected, has an unaffected partner with no relevant family history. Which of the following is correct regarding their children?
TLS Online TPP Program
#Question id: 12489
#Unit 8. Inheritance Biology
Achondroplasia shows autosomal dominant inheritance with complete penetrance. A man with achondroplasia has an unaffected partner of normal height. Their first two children are not affected. Which of the following is correct?
TLS Online TPP Program
#Question id: 12490
#Unit 8. Inheritance Biology
Tay-Sachs disease shows autosomal recessive inheritance. Parents of a newly diagnosed affected child are referred for genetic counselling. It would be correct to tell them that:
TLS Online TPP Program
#Question id: 12491
#Unit 8. Inheritance Biology
Phenylketonuria shows autosomal recessive inheritance with an incidence of 1 in 10000. Assume that the population is in Hardy-Weinberg equilibrium. Which of the following is correct?