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Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation2 Marks
Question
A pedigree chart given below, present a particular generation which shows a trait irrespective of sexes (i.e., present in both male and female). Neither of the parents of the particular generation shows the trait. Draw your conclusion on the basis of the pedigree.
✓

Answer

The trait is autosome linked and recessive in nature. Both the parents are carriers (i.e., heterozygous).
Hence, among the offsprings only few show the trait irrespective of sex.
The other offsprings are either normal or carrier.

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