Sex Determination - Sex Determination in Birds

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Notes

Sex determination in birds:

  • In birds, male is homogametic, whereas female is heterogametic.
  • Females produce two types of gametes, one containing autosomes with Z chromosomes and the other containing autosomes with W chromosomes.
  • Males produce all similar types of gametes, each having a single Z chromosome.
  • A cross between the males and females can be described as follows:

    Sex determination in birds

  • The sex of the zygote depends on which egg gets fertilized.
  •  'ZZ-ZW Type' of Sex Determination method is seen in birds, fowls, and fishes.
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