Principles of Inheritance and Variation — MCQ Practice

In a monohybrid cross between two heterozygous individuals (Aa x Aa), what will be the expected phenotypic ratio in the F2 generation if 'A' is completely dominant over 'a'?

A cross between a red-flowered Mirabilis jalapa plant and a white-flowered Mirabilis jalapa plant results in all pink-flowered F1 offspring. If these F1 plants are self-pollinated, what will be the phenotypic ratio of the F2 generation?

A man with blood group A marries a woman with blood group B. Their first child has blood group O. What are the genotypes of the parents?

Which of the following is an example of a Mendelian disorder?

If a male with genotype X$^A$Y (where X$^A$ is a dominant allele on the X chromosome) marries a female with genotype X$^A$X$^a$ (heterozygous), what is the probability that their son will inherit the recessive allele X$^a$?

In a dihybrid cross between two heterozygous individuals (RrYy x RrYy), what is the expected proportion of offspring that will be homozygous recessive for both traits (rryy)?