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In Ursa gummi, the famed Gummy Bear soldiers, a quality that is sought is bravery (dominant phenotype). The recessive phenotype is timidity or conformity. The alleles and genotypes corresponding to these phenotypes at two loci are presented below. A_ codes for brave; aa codes for timid/conforming; B_ codes for brave; bb codes for timid/conforming. What is the phenotypic ratio of brave:timid offspring from a cross between two doubly heterozygous Ursa gummi, if the mode of inheritance is duplicate recessive epistasis?

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NtinuEmmanuel

Answer:

Phenotype- 100% for the recessive trait (aa, bb)

Explanation:

This happens because of the mode of inheritance, which would mask the dominant trait, during a cross. Therefore, this would lead to all offspring not expressing the dominant phenotype

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