Heterosis, where crossbred offspring outperform both inbred parents in growth or yield.
Heterosis occurs when crossing inbred lines gives superior F1 hybrids, often explained by dominance (masking harmful recessives) and overdominance. Modern hybrid maize yields far more than open-pollinated varieties.
The benefit declines in later generations, so farmers buy new seed.
Heterosis, where crossbred offspring outperform both inbred parents in growth or yield.
Hybrid Vigour is one of the 54 topics in Genetics. It is rated Advanced, so it suits learners who want specialist depth. Related topics in this area include Heredity, Crossing Over, Genomic Imprinting.
A mule (horse x donkey) is stronger than either parent but is sterile.
Work through the Beginner topics in Genetics first, such as Heredity, Gene, Allele, then return to Hybrid Vigour. Advanced topics assume the Intermediate vocabulary.
The closest topics to Hybrid Vigour are Heredity, Crossing Over, Genomic Imprinting, Quantitative Trait Loci. Comparing them side by side is a good way to see how the ideas connect.
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Hybrid Vigour. To practise the whole of Genetics, use the Genetics quiz.
Hybrid Vigour: Heterosis, where crossbred offspring outperform both inbred parents in growth or yield. Heredity: The passing of traits from parents to offspring through genetic material. Read both side by side and note what each one explains.
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Heredity and explain the difference aloud. Finally, take the Genetics quiz and come back to this page for any question you miss.
The passing of traits from parents to offspring through genetic material.
🧬 GeneticsExchange of segments between homologous chromosomes in prophase I that creates new allele combinations.
🧬 GeneticsParent-of-origin-specific gene expression caused by epigenetic marks, as seen in IGF2 and H19.
🧬 GeneticsRegions of the genome statistically associated with variation in continuous traits.
🧬 Genetics