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16. In peas, tall plants (T) are dominant to short (t) and purple (P) is dominant...

16. In peas, tall plants (T) are dominant to short (t) and purple (P) is dominant to white flower color (p). What are the phenotypes of cross between ttPp and TtPP?

Solutions

Expert Solution

  • Ans : tall and purple and short, purple plants will be produced on crossing ttPp×TtPP
  • Phenotype is the physical characteristic produced by a genotype (genetic composition).
  • Alternative forms of a gene are known as alleles for example 'T' and 't' are two forms of the height governing gene which produce two different phenotypic effects I.e tall and short respectively.
  • A dominant allele(T or W) is the one whose phenotypic effect is produced in heterozygous condition(Tt or Pp) i.e. in heterozygous condition it nullifies the phenotypic effect of the recessive allele(t or p).
  • A recessive allele is the one whose phenotypic effect is produced only when it is present in homozygous condition ( tt or we) because in heterozygous condition (Tt and Pp) phenotypic effect of recessive allele is nullified by the dominant allele(T or P).

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