Some of the regions in the eye lack color, whereas others are red. This is because the white gene (required to develop red pigment) was inactivated by adjacent heterochromatin in some cells, but remained active in others.

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#Unit 8. Inheritance Biology

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#Unit 8. Inheritance Biology

EPIGENETICS

Genomic imprinting is just one form of a phenomenon known as epigenetics.

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#Unit 8. Inheritance Biology

X-Chromosome inactivation in Female Behaviour in honeybee alter by epigenetic change X-Chromosome inactivation in Female Behaviour in honeybee alter by epigenetic change         

 

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#Unit 8. Inheritance Biology

However, these mutations also interfere with the synthesis of melanin pigment, lightening the color of the hair; therefore, individuals with PKU frequently have light brown or blond hair.

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#Unit 8. Inheritance Biology

Anticipation  Increasing severity or earlier age of onset of a genetic trait in succeeding generations. 

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#Unit 8. Inheritance Biology

PLEIOTROPY

When a gene affects many aspects of the phenotype, it is said to be pleiotropic.