Answer :

If the two loci of characters are linked then the distance separating them will be very small and recombination will not be able to take place in between them. Thus no segregation can be observed. As the parent is heterozygous thus both dominant and recessive alleles are present on the two homozygous chromosomes and one chromosome is obtained by the gamete. Thus, in the F1 generation for a dihybrid cross, if this gamete contains the dominant traits and is fertilized by either dominant or recessive alleles of the same trait from the other parent the dominant phenotypic character are observed. The recessive linked phenotype of the traits are only observable only when the both the gametes from the parents that are fertilized contains the recessive trait. Also due to no segregation between the two linked traits, they are always found together in both the cases.


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