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Question:

Study the pedigree chart of a certain family given above and select the correct conclusion which can be drawn for the character. The parents could not have had a normal daughter for this character. The trait under study could not be colour-blindness. The female parent is heterozygous. The male parent is homozygous dominant.

The female parent is heterozygous.

The parents could not have had a normal daughter for this character.

The trait under study could not be colour-blindness.

The male parent is homozygous dominant.

Solution:

To have both sons and daughters showing the trait, both parents should have at least one copy of the allele. In given pedigree, female parent is shown normal which makes her heterozygous carrier.