What is the difference between monohybrid and dihybrid cross

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Discussion Overview

The discussion revolves around the distinction between monohybrid and dihybrid crosses in genetics, particularly in the context of specific plant genotypes. Participants explore definitions and examples related to these genetic crosses.

Discussion Character

  • Conceptual clarification, Debate/contested

Main Points Raised

  • One participant presents a scenario involving two plants with genotypes YyTT and yyTT, questioning whether this represents a monohybrid or dihybrid cross.
  • Another participant defines monohybrid and dihybrid crosses, emphasizing that they involve homozygous parents and arguing that the given genotypes do not fit this definition.
  • A third participant shares a link to an external resource, possibly for further clarification on the topic.
  • Another participant expresses confusion regarding the information presented in the discussion.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on whether the example provided constitutes a monohybrid or dihybrid cross, with differing interpretations of the definitions involved.

Contextual Notes

There are limitations in the discussion regarding the definitions of monohybrid and dihybrid crosses, as well as the implications of using specific genotypes in examples. Some assumptions about homozygosity and trait representation remain unresolved.

rashida564
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and if I have two plants the first one with a genotype of YyTT and the second one with a genotype of yyTT fertilise them this would be a monohybrid or dihybrid cross.
 
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The definition of both monohybrid & dihybrid is 'cross between homozygous parents...'
So yyTT YYTT does not involve T because TT and TT are the same, YY is homozygous, yy is homozygous, this is one trait == monohybrid

So the answer to your question is: YyTT x YYTT is neither. It needs to be either yyTT x YYTT, or yyTT x yytt - homozygous only, no Yy and no Tt.
 
http://imgur.com/a/S09aJ i read this thing
 
i didn't understand it
 

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