Question

Write the law of dominance and workout a monohybrid cross for pea plant by selecting the trait of flower colour .​

Answer 1

Answer:

Law of dominance: - if there are two dissimilar factor (allele) present in an organism for a character. Only one factor express itself to give their character, that factor is called dominant allele and other allele which does not express is known as recessive allele.

monohybrid cross for pea plant by selecting the trait of flower colour

       violet (VV)                    ×                   white (vv)                          parent

(dominant homozygous)                       (recessive homozygous)

           ↓                                                         ↓

F1             V                                                         v                             gamete

     

           progeny:   VV ,Vv, Vv, vv

phenotype- violet , white

phenotypic ratio - 3:1

genotype - VV , Vv, vv  ( homozygous dominant, heterozygous dominant , homozygous recessive)

genotypic ratio - 1:2:1