A monohybrid cross between heterozygote F1 progeny and its hom*ozygous recessive parent was done. Assuming it to be a mendelian cross, What will be the ratio of different phenotypes in F2 generation? (2024)

Q. In a typical Mendelian cross, which is a dihybrid cross, one parent is hom*ozygous for both dominant traits and another parent is hom*ozygous for both recessive traits. In the F2 generation, both parental combinations and recombinations appear. The phenotypic ratio of parental combinations to recombinations is

Q. In a Mendelian dihybrid cross, if one trait shows incomplete dominance and other trait shows hom*ozygous dominant lethality then what will be the phenotypic ratio of progenies obtained in F2 generation?

Q. Five Mark Questions :
(a) A true breeding hom*ozygous Pea plant with green pods and axial flowers as dominant characters is crossed with a recessive hom*ozygous Pea plant with yellow pods and terminal flowers. Work out the cross upto F2 generation giving the phenotypic ratios of F1 and F2 generations respectively.
(b) State the Mendelian principle which can be derived from such a cross and not from monohybrid cross.

Q. What is the cross between the F1 progeny and the hom*ozygous recessive parent called? How is it useful?