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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 (C) 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 (C) Signup and view all the answers

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

C, D, and E genes (D) 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 (D) 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 (A) 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 (D) Signup and view all the answers

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

They are codominant (C) Signup and view all the answers

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