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#selection

7 public questions tagged with this topic.

In pedigree breeding, selection starts from:

In pedigree breeding, segregation reaches maximum in F2 after crossing two homozygous parents to create heterozygous F1. F1 meiosis produces recombination through crossing over and independent assortment, generating new genotypic combinations in gametes. Fertilization of these gametes creates F2 individuals that vary widely for both oligogenic and polygenic traits, exposing recessive alleles and transgressive segregants exceeding parental ranges. Selection pressure cannot discern these recombinants in F1 because all F1 share identical heterozygous genotype. Starting individual plant selection

Ref: Simmonds NW & Smartt J. Principles of Crop Improvement, Chapter 6. NCERT Class XII Biology, Chapter 9

Selection maintaining mean but reducing SD is:

Stabilizing reflects key principle in quiz on section a solved pyqs, where evolutionary mechanisms shape genetic variation and adaptation. In this context, Stabilizing aligns with experimental and theoretical evidence from population genetics, behavioral ecology and molecular phylogeny. Textbooks like Campbell Biology, Futuyma Evolution and Hartl Principles illustrate supporting data. Understanding why Stabilizing fits helps integrate natural selection, environment.

Ref: Campbell Biology, Evolution Chapters, Selection Types.

Selection increasing homozygosity is:

Inbreeding reflects key principle in quiz on section a solved pyqs, where evolutionary mechanisms shape genetic variation and adaptation. In this context, Inbreeding aligns with experimental and theoretical evidence from population genetics, behavioral ecology and molecular phylogeny. Textbooks like Campbell Biology, Futuyma Evolution and Hartl Principles illustrate supporting data. Understanding why Inbreeding fits helps integrate natural selection, environment.

Ref: Campbell Biology, Evolution Chapters, Selection Types.

Allele frequencies can change due to all EXCEPT:

Random mating reflects key principle in quiz on hardy–weinberg principle, where evolutionary mechanisms shape genetic variation and adaptation. In this context, Random mating aligns with experimental and theoretical evidence from population genetics, behavioral ecology and molecular phylogeny. Textbooks like Campbell Biology, Futuyma Evolution and Hartl Principles illustrate supporting data. Understanding why Random mating fits helps integrate natural selection, environment.

Ref: Hartl, Primer of Population Genetics, Hardy-Weinberg Equilibrium.