Breeding Systems: Match the Column

Correct Answer: 1-c, 2-e, 3-d, 4-b, 5-a

From Table 4 (Types of Outbreeding) and Table 2 (Types of Inbreeding) in the notes:

• 1. Inbreeding (c): Mating of related individuals → increases homozygosity. Also called genetic assortative mating.
• 2. Outbreeding (e): Mating of unrelated individuals → increases heterozygosity. Also called genetic disassortative mating.
• 3. Panmixia (d): Random mating — as defined in Hardy-Weinberg law notes.
• 4. Grading up (b): Repeated use of purebred sires on non-descript local females generation after generation → pure breed obtained after 7–8 generations (Table 5). 1st generation = 50% purity; 8th generation = 99.6% purity.
• 5. Crossbreeding (a): Mating between animals of different breeds within same species → new breed is evolved. Examples: Karan Swiss, Jersindh, Frieswal (cattle); Hissardale, Avikalin (sheep).