What Offspring Result from a Homozygous Dominant Cross with an Unknown Genotype?

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SUMMARY

Crossing an individual that is homozygous dominant (DD) for a trait with an individual of unknown genotype will result in offspring that exhibit a dominant phenotype. The possible crosses include DD x Dd, DD x DD, and DD x dd. However, since the homozygous dominant parent guarantees at least one dominant allele in all offspring, the phenotype will consistently reflect the dominant trait.

PREREQUISITES
  • Understanding of basic genetics terminology, including "homozygous" and "dominant phenotype."
  • Knowledge of Punnett squares for predicting genetic outcomes.
  • Familiarity with genotype notation (e.g., DD, Dd, dd).
  • Basic principles of inheritance patterns in Mendelian genetics.
NEXT STEPS
  • Study Punnett squares in detail to visualize genetic crosses.
  • Explore Mendelian inheritance patterns, focusing on dominant and recessive traits.
  • Investigate the implications of unknown genotypes in genetic predictions.
  • Learn about the impact of homozygous and heterozygous crosses on offspring traits.
USEFUL FOR

Students studying genetics, educators teaching Mendelian inheritance, and anyone interested in understanding genetic predictions and phenotypic outcomes.

shawonna23
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1. Homework Statement

Crossing an individual who is homozygous dominant for a trait with an individual whose genotype is unknown will most likely produce which set of offspring?


2. Homework Equations

DD x ? DD x Dd DD x DD DD x dd

3. The Attempt at a Solution

100% dominant phenotype
 
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Yep, most likely a dominant phenotype.
 
Thanks!
 

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