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Question

Fused ear lobes appear En the progeny due to an autosomal recessive gene. Work out the genotypes of members in the given pedigree.
932054_b397c2070ff24663bfb8467f598f2c3e.png

A
I-2-aa, II-3-Aa, III-1-Aa
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B
I-2-aa, II-3-AA, III-1-AA
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C
I-2-Aa, II-3-Aa, III-1-Aa
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D
I-2-aa, II-3-Aa, III-1-AA
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Solution

The correct option is B I-2-aa, II-3-Aa, III-1-Aa
Given pedigree chart for fused ear lobes (autosomal recessive trait) can be explained as follows
1400455_932054_ans_547dcee4a4104582801816ea1d471835.png

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