• Group of symptoms is called a Syndrome.
  • Grow out test is used for assessing genetic purity of seeds.
  • Guanine pairs with cytosine via 3 hydrogen bonds.
  • H. B. Singh contributed to germplasm collection.
  • H. J. Muller received Nobel Prize for inducing mutations in Drosophila using X-rays.
  • Haploid-Diploid sex determination occurs in honey bees and wasps.
  • Incomplete penetrance refers to heterozygous condition not fully expressing the normal phenotype.
  • Ophioglossum (Pteridophyta) has the highest chromosome number (2n > 1200).
  • Highly condensed chromatin is called Heterochromatin.
  • H. J. Muller used X-rays to induce mutations in fruit flies.
  • Rice has 22 wild species.
  • Sunflower oil contains about 90% polyunsaturated fatty acids (PUFA).
  • Male sterility is maintained by crossing A line with B line.
  • Human blood groups are an example of multiple alleles.
  • Luxuriance in hybrids was described by Naudin.
  • H4 cotton variety was developed at GAU, Surat.
  • Half diallel cross formula is n(n−1)/2.
  • Hand pollination in seed production is practiced in cotton.
  • Anther culture is used to develop haploids.
  • Haploids exhibit weak phenotype.
  • Haploid with an isochromosome is called Mis-division haploid.
  • Harlan proposed the mass pedigree method.
  • Herkogamy prevents self-pollination due to physical barriers (e.g., alfalfa).
  • Hershey and Chase used ³²P to label DNA in their experiments.
  • Heterostyly promotes cross-pollination via differing style and filament lengths (e.g., linseed).
  • Segregation releases heterozygotic potential variability.
  • Potential variability is hidden variability not accessible for selection.
  • High benzyl alcohol in wheat provides resistance to green bugs.
  • High silica in rice provides resistance to yellow stem borer.
  • Bulk breeding gives highest genetic variance in population.
  • Single cross hybrids show highest uniformity.
  • Maize is a highly cross-pollinated species.
  • High inbreeding depression is observed in alfalfa and carrot.
  • Hotspots are highly mutable sites within a gene.
  • Histones are rich in lysine and arginine.
  • Holiday proposed a model for homologous recombination.
  • Homeologous chromosomes are present in wheat.
  • Homogamy refers to synchronous maturation of male and female gametes.
  • Orthologues are homologous genes within the same organism with similar functions.
  • Homomorphic self-incompatibility is physiological, not morphological.
  • Homomorphic systems include gametophytic and sporophytic types.
  • Horizontal resistance is non-specific resistance.
  • Horizontal axis in graphs is called the Abscissa (X-axis).
  • Hotspots for Karnal bunt include Ludhiana, Surdaspur, Hisar, and Shimla.