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Go Back   Talk Budgies Forums > Budgie Talk > Budgie Breeding > Mutations and Genetics


Mutations and Genetics Learn about budgie genetics and the wide variety of mutations.

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Old 05-18-2018, 10:45 AM
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Default TCB babies or not

Hello, I will have some questions. My TCB hen and the cock bird of the visual. They made their 4th egg today. What can we tell you about future babies? Do you think Texas budgie will give birth to a baby mutation? I'm curious about your estimates.
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Old 05-18-2018, 08:22 PM
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They're a beautiful pair!

TCB is a sex-linked mutation. This means that it is located on the sex chromosomes and is inherited differently by males and females. Because your TCB budgie is a hen, all male budgies will be split for TCB but will not show it visually.

None of the female babies will carry the mutation either visually or in its split form, as they only have one X chromosome and are therefore unable to carry a sex-linked mutation without expressing it. Because they will inherit their one X chromosome from their father, who does not have the mutation, the female babies will not have the TCB mutation. On the other hand, the male babies inherit one X chromosome from each parent, and that from the mother will have the TCB gene so they will be split.

Does that make sense?
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