Looking for classes? Ksquare Career Institute, Bengaluru →
$F_2$ generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1 : 2 : 1. It represents a case of
A
Monohybrid cross with incomplete dominance
B
Co-dominance
C
Dihybrid cross
D
Monohybrid cross with complete dominance
Detailed Solution
In incomplete dominance the heterozygote has an intermediate phenotype, so each genotype has its own phenotype.
In Mirabilis jalapa or snapdragon the $F_2$ shows 1 red (RR) : 2 pink (Rr) : 1 white (rr), so the phenotypic and genotypic ratios are both 1 : 2 : 1.
With complete dominance the phenotypic ratio would be 3 : 1.
In Mirabilis jalapa or snapdragon the $F_2$ shows 1 red (RR) : 2 pink (Rr) : 1 white (rr), so the phenotypic and genotypic ratios are both 1 : 2 : 1.
With complete dominance the phenotypic ratio would be 3 : 1.