A secretor is a person who secretes their blood type antigens into body fluids a

Question

A secretor is a person who secretes their blood type antigens into body fluids and secretions such as saliva. By comparison, a non-secretor does not. A person's status as a secretor or non-secretor is independent of blood type. Consider the following inheritance pattern of this trait: secretor x secretor rightarrow all offspring are secretors non-secretor x non-secretor rightarrow all offspring are non-secretors secretor x non-secretor rightarrow all offspring are secretors F_1 generation secretors rightarrow R_2 generation = 75% secretors, 25% non-secretors A). Based on the inheritance pattern, the secretor trait is A. sex-linked. B. recessive. C. autosomal dominant. D. co-dominant. B). The genotypic ratio produced in the F_2 generation is A. 3:1. B. 1:2:1. C. 3/4:1/4. D. cannot determine from the information provided. C). Based on the inheritance pattern of the secretor trait, a secretor can have a genotype of A. either Se/Se or Se/Se. B. either Se/Se or Se/ns. C. Se/Se. D. se/se.

Explanation / Answer

(3)

A) C. AUTOSOMAL Dominant

B) B. 1:2:1

C)A. Either Se/Se or Se/se

A secretor is a person who secretes their blood type antigens into body fluids and secretions such
as saliva. By comparison, a non-secretor does not. A person's status as a secretor or non-secretor is
independent of blood type

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