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Inheritance and Variation — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYInheritance and Variation4 Marks
Question
Autosomal inheritance.
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Answer

  1. Transmission of body characters occurs due to autosomes. They are not concerned with sex determination or sex linkage.
  2. All the body characters from parents are passed on to their offspring through autosomes. This is called autosomal inheritance.
  3. Some autosomal characters are due to dominant genes while some other are due to recessive genes. E.g. Widow’s peak and Huntington’s disease is also autosomal dominant character, etc.
  4. Phenyl ketonuria (PKU), Cystic fibrosis and Sickle-cell anaemia are autosomal recessive traits.

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