Parental Genetics for Type 0 Blood - Biology Question 8

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Discussion Overview

The discussion revolves around identifying potential parental genotypes that could result in a child with type O blood. Participants explore the genetics of blood types, specifically the implications of different combinations of alleles (IA, IB, i) and how they relate to blood type inheritance.

Discussion Character

  • Homework-related
  • Conceptual clarification
  • Exploratory

Main Points Raised

  • One participant asks which parental combinations could yield a child with type O blood, presenting four options.
  • Another participant emphasizes the importance of understanding blood type combinations and suggests using a Punnett Square to analyze the problem.
  • A participant expresses confusion about the meaning of the alleles (I, i, A, B) and their relationship to blood types, indicating a need for clarification on genetic terminology.
  • One participant proposes that options C and D could be correct, leaning towards D after performing a Punnett Square analysis that resulted in the ii genotype, which corresponds to type O blood.
  • A later reply confirms the reasoning of the participant who suggested D as the correct answer, expressing approval with an emoticon.

Areas of Agreement / Disagreement

Participants generally agree that options C and D could potentially lead to a child with type O blood, but there is no consensus on which is definitively correct, as the discussion remains exploratory.

Contextual Notes

Some participants express uncertainty regarding the genetic notation and the implications of dominant versus recessive alleles, indicating that further clarification on these concepts may be necessary.

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8. Which of the following could be the parents of a child with type 0 blood?
A: IBIB X IBI B: IAIB X IBi
C: IAIB X ii D: IAi X IBi


I have not idea which one is the correct one help me please
 
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What do you know about those blood types? When you combine them in various combinations (AxA,AxB,Ax0,BxB,Bx0,0x0) what blood type (expression) will the offspring of these crosses have? Do you know how to use a Punnett Square?
 
Yes, i know how to use a Punnette square, and i do know the combintations.. the problem is that I don't understand what I or i stands for... nor B or b.. B must be a dominant gene nd b must be a recessive gene.. but gene of what? blood type O??
 
C and D seem like a correct answer, but i think D is the correct one.. because when i did the punette square, one of genotypes were ii which is type O.. am i on the right track?
 
Yes! :smile:

And here is another good reference
that addresses the I, i, A, B, O part of your question.
 
Last edited:

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