Plz explain this question..

Dear Student,

Option 3 is correct. Since all the progenies are affected it means that the allele is dominant. 

Those alleles which are able to express the traits carried by them in homozygous as well as in heterozygous condition are known as dominant genes. For eg: The tallness of the pea plant is a dominant trait represented as "TT"/"Tt".

Regards

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