NEET UG 2010 — Principles of Inheritance and Variation

In Antirrhinum, two plants with pink flowers were hybridized. The $\mathrm{F}_1$ plants produced red, pink and white flowers in the proportion of 1 red, 2 pink and 1 white. What could be the genotype of the two plants used for hybridization? Red flower colour is determined by $\mathrm{RR}$, and white by $\mathrm{rr}$ genes.

Select the correct statement from the ones given below with respect to dihybrid cross.

Study the pedigree chart of a certain family given below and select the correct conclusion which can be drawn for the character. 

The fruit fly, Drosophila melanogaster was found to be very suitable for experimental verification of chromosomal theory of inheritance by Morgan and his colleagues because

The genotype of a plant showing the dominant phenotype can be determined by

Which one of the following cannot be explained on the basis of Mendel's Law of Dominance?

Which one of the following symbols and its representation, used in human pedigree analysis is correct?