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Mendelian and Non-Mendelian Inheritance

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Questions and Answers

What is the primary function of the enzyme encoded by the I gene in determining ABO blood type?

Forming the Lewis antigen

Encoding the Rh blood type antigen

Adding fucose to a protein in the cell membrane

Attaching a different molecule to the sugar chain protruding from RBC cell membrane (correct)

Which of the following is an example of a phenocopy?

A child developing AIDS due to environmental factors (correct)

A twin developing leukemia due to genetic inheritance

A person's Rh blood type being determined by the C, D, and E genes

A person inheriting the A allele from their parents

What is the role of the H gene in determining ABO blood type?

Encoding an enzyme that attaches fucose to a protein in the cell membrane (correct)

Encoding an enzyme that adds 4 monosaccharides to the sugar fucose

Encoding an enzyme that attaches a galactose or N-acetyl galactosamine molecule to the sugar chain

Determining the Rh blood type antigen

How many alleles are associated with the I gene?

3 Signup and view all the answers

What is the function of the L gene (Lewis) in determining ABO blood type?

Encoding an enzyme that adds 4 monosaccharides to the sugar fucose Signup and view all the answers

Which of the following genes determines the Rh blood type antigen?

C, D, and E genes Signup and view all the answers

What is the consequence of the I gene having 3 alleles (A, B, and i) in determining ABO blood type?

The formation of a combination of antigens Signup and view all the answers

What is the role of the environment in the development of a phenocopy?

Causing the trait to develop through environmental factors Signup and view all the answers

Which of the following is NOT a function of the genes involved in determining ABO blood type?

Forming the DNA molecule Signup and view all the answers

What is the characteristic of the alleles associated with the I gene?

They are codominant Signup and view all the answers