Question

Genotypic ratio of monohybrid cross is
A. 3:1
B. 1:2:1
C. 1:1
D. 9:3:3:1

Answer 1

Hint: The genotypic ratio for the monohybrid cross is 1:2:1 of an organism found in the offspring when genes for certain traits are crossed. In the genotypic 2 types of variation and alleles one from each parent such as plants and animals. When the two heterozygous crossed 1, homozygous dominant 2 and homozygous recessive 1 then phenotypic observed ratio probably a lethal allele.

Complete answer:
At the one genetic chromosomes a monohybrid cross is a cross between the two organisms with different variations. Two or multiple variations occurred in the single locus during the monohybrid cross. Monohybrid cross generated by the cross between the two parents and chosen to be homozygous or true breeding for a given locus (trait).
The dominance relationship between the two alleles obtained from the help of monohybrid cross that begins with the parental generation. One parent homozygous on the one allele and other parent is homozygous for the other allele and obtained the first F1 generation. F2 generation produced from the F1 generation. The pea was chosen as an experimental organism by Gregor Mendel (1822-1884) for the inheritance study. And Mendel investigated seven variable characteristics in the pea plant.

Therefore the correct option is (B).

Note: After the test cross of the offspring’s the genotypic ratio described by the number of times present in the genotype. Such as a test cross between the same kind of genotype. The monohybrid cross obtained on the second generation F2 offspring’s known as a monohybrid ratio.