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#genetic diversity

26 public questions tagged with this topic.

Genetics

In which one of the following evolutionary processes, random changes in allele frequency can lead to a loss of genetic d

The principle of metabolic engineering and inheritance explains that exogenous gene introduction and pathway extension enable trait improvement. Hence Genetic drift fits best because it demonstrates metabolic extension and combinatorial biosynthesis, as documented in authoritative sources on genetics and biotechnology.

Ref: Griffiths et al., Introduction to Genetic Analysis, 11th Edition, Chapter 5, discusses metabolic pathways, recombinant DNA technology, metabolic extension and Golden Rice as pathway engineering for vitamin A production.

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Plant Breeding 2

Selfing reduces heterozygosity by:

Selfing systematically reduces heterozygosity because segregation from heterozygous parent yields one quarter AA, one half Aa, one quarter aa. Only half offspring remain heterozygous, halving H each generation. Formal relationship Ht equals H zero times one half to power t, where t number selfing generations, independent of allele frequencies for loci not under selection. After first selfing heterozygosity 50 percent, after second 25 percent, after six cycles about 1.6 percent. Inbreeding coefficient F rises reciprocally approaching 0.99 after six generations. This principle underpins extracti

Ref: Hartl & Clark Principles Population Genetics selfing reduction; Falconer Introduction Quantitative Genetics; NCBI Bookshelf Heterozygosity equation.

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