19) Autosex character of poultry species

Question 1

Autosex chicken

Answer 1

Offspring of a hen and a rooster of the same breed and variety

Question 2

Autosexing of poultry can be affected by…

Answer 2

Dose effect

Question 3

Dose-effect in autosexing of poultry

Answer 3

• May occur in Z-linked inheritance
• Causes different characteristics in the two sexes at birth/hatching
  
  • Different colours

Question 4

Homo- and heterogametic sexes are different colours due to…

Answer 4

• Dose-effect
• In genetically pure lines from hatching to adult age

Question 5

Impact of genes on autosex character of poultry

Answer 5

• Pigmentation inhibitor genes (pigeon breeds)
• Barring in chickens (Homogametic males = lighter)
• Grey feathers in geese (Homogametic males = darker)

Question 6

Autosex character is different to…

Answer 6

Sexual dimorphism