Complex Inheritance Patterns

Which is the correct genotype for a carrier?

• AA

• Aa

• aa

Which disease causes a build-up of fluid in the lungs?

• Galactosemia

• Tay-Sachs

• Albinism

• Cystic Fibrosis

Which genetic disorder can be inherited even if only one allele is present?

• Achondroplasia

• Tay-Sachs

• Albinism

• Cystic fibrsis

Which shape represents a female in a pedigree chart?

• diamond

• circle

• square

• triangle

An organism with a genotype of C^YC^X displays a phenotype that is half way between the 2 parents. What kind of inheritance pattern is this?

• complete dominance

• codominance

• multiple alleles

• incomplete dominance

Which statement about sickle cell anaemia is NOT true?

• Heterozygous individuals have both sickle and normal blood cells

• Individuals who are homozygous for the sickle allele cannot carry oxygen around the body well

• A heterozygous individual is more resistant to malaria

• The sickle cell allele is found mostly in Europe

Sex-linked traits are rare in women because ...

• women are healthier than men

• the Y chromosome carries many defective genes

• their second X chromosome still produces the correct protein

• the X chromosome is bigger than the Y chromosome

What is the chance that a woman with a recessive disorder passes on a recessive allele to her offspring?

• 25%

• 50%

• 75%

• 100%