{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

CH_1_2_3_practice_questions_for_EXAM_1

CH_1_2_3_practice_questions_for_EXAM_1 - For additional M/C...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
For additional M/C practice questions, use the website from the book PRACTICE PROBLEM-BASED QUESTIONS 45. The secretor trait in humans enables the A and B red blood cell antigens to be secreted in body fluids, including saliva and semen. The dominant Se allele causes the A and B antigens (if present in red blood cells) to be secreted in water- soluble form; the se allele results in no secretion. The secretor locus assorts independently of the ABO locus. A secretor man with type A blood marries a non-secretor woman with type B blood and their first child is a non-secretor with type B blood (child is typed out using blood). Which one of the following four statements (a-d) about this couple, if any, is incorrect ? a. the man MUST be heterozygous at both the ABO gene and the secretor gene b. the probability that their next child will be a non-secretor is ½ c. their first child must be heterozygous at both the ABO gene and the secretor gene d. ignoring the B antigen, the probability that their next child will secrete the A antigen is 1/4
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}