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In tigers, a recessive allele causes a white tiger (absence of fur pigmentation). If one phenotypically normal tiger that is heterozygous is mated to another that is phenotypically white, what percentage of their offspring is expected to be white?

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marianaegarciaperedo

Answer:

50% of the progeny are white animals, with pp genotype.

Explanation:

Available data:

  • The recessive allele, p, causes a white color
  • The dominant allele, P, causes pigmentation.
  • Cross: One phenotypically normal tiger that is heterozygous is mated to another that is phenotypically white.  

What percentage of their offspring is expected to be white?

Parental)   Pp     x     pp

Gametes) P   p       p   p

Punnet square)     P          p

                     p     Pp        pp

                     p     Pp        pp

F1) 50% of the progeny are pigmented animals, with Pp genotype.

     50% of the progeny are white animals, with pp genotype.

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