Secretor gene 'Se' is present on chromosome:
Correct answer: B. 19
- A. 11
- B. 19
- C. 21
- D. 25
Explanation
ABH secretions are controlled by fucosyletransferase 2 (FUT2) secretor gene located on the short arm of chromosome number 19 in the form of two alleles denoted as "Se" and "se". The Se is dominant while se is recessive (or amorphic) in their pattern of inheritance.
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About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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